Due Diligence: What Investors Miss Can Destroy Your Wealth 

I screwed up.

And it cost me millions in compounded potential wealth.

When I was a new investor, I thought investment decisions couldn’t be that hard. I had sold my company to a public firm, had capital to deploy, and assumed common sense would carry me a long way. How hard could it be to review a deal, listen to a sponsor, compare projected returns, and decide?

But I didn't do it well. Instead of leaning into due diligence, I got trapped into chasing shiny objects.

I learned the hard way.

I should have listened more carefully to Charlie Munger. His warning was blunt: “It’s not supposed to be easy. Anyone who finds it easy is stupid.” Munger was diagnosing one of the most dangerous conditions in investing: overconfidence before competence.

Eighteen years later, in 2015, we launched Wellings Capital. My astute partner, Ben, and I made the investment decisions. We were careful, and built systems, pattern recognition, and scar tissue.

Today, we manage eight funds, and we’ve added four skilled team members to evaluate operators, markets, capital stacks, assumptions, risks, and underwriting.

We equipped our team with expensive tools like Trepp, RadIX, and others. We spend over $70,000 annually for these research and analytics tools, plus at least $20,000 per deal that gets to the finish line. We compensate our team well. We spend more time, money, and manpower than ever trying to answer one question: What could go wrong here?

I assumed the process would get easier. But the opposite has happened.

It’s getting harder.

Not because we know less, but because we know more.

The more deals we review, the more failure modes we see.

The more operators we underwrite, the more subtle flaws we notice.

The more markets we study, the more we realize a beautiful story can hide a fragile reality.

Robust due diligence is one of the few things standing between investors and avoidable disaster.

Why a Good Investment Story Does Not Equal Due Diligence

Many investors do not actually underwrite investments. They underwrite stories. They like the sponsor, the asset class, the projected returns, the webinar, and the confidence on the other end of the call. Then they fill in the blanks with hope.

But hope is not due diligence. A glossy pitch deck is not a margin of safety. A track record in one market is not proof of competence in another. A high projected IRR is not evidence that the capital stack can survive a refinancing shock, slower lease-up, insurance spike, tax reassessment, or poor communication.

Buffett’s famous Rule No. 1 is “Never lose money.” Rule No. 2 is “Never forget Rule No. 1.” No investor can guarantee every deal will work. But the principle is about orientation. Start with avoiding permanent impairment of capital, downside protection, and the discipline to just say no.

“The difference between successful people and really successful people is that really successful people say no to almost everything.”  -- Warren Buffett

What Should Investors Review During Due Diligence?

Our process begins with the operator. We want to know whether the key principals have deep, direct experience in the relevant asset class. Not adjacent experience. Not theory. Not one lucky deal in a forgiving cycle. We want evidence that they have lived through problems, made hard decisions, protected investors, and learned lessons.

We review the operator’s track record, including best deals, worst deals, and recent deals. The worst deals are often the most revealing. What happened? What did they miss? How did they communicate? Did they put in more capital? Did they protect investors or protect themselves? What did they learn and did anything change in their process as a result?

We also review the current portfolio. A sponsor may have a strong past record but be overwhelmed today. Active holdings, hidden capital needs, maturing debt, weak DSCR, delayed business plans, staffing limitations, or too many acquisitions can turn a good operator into a stretched operator… or one that fails.

Alignment matters as well. We want to know how much personal capital the principals invest alongside investors. We review acquisition, asset management, disposition, refinance, property management, construction management, and other fees.

Fees are not automatically bad. Misaligned fees are dangerous. If a sponsor gets paid handsomely on the front end while investors carry most of the risk, that is not alignment. We’ve seen too many cases where operators claim to put skin in the game after collecting more fees than their personal investment. They are already making a profit on the day of acquisition.

Transparency matters too. We look for open-book access, clear reporting, responsive communication, and evidence that the operator sees investors as long-term partners. When an operator resists basic questions or treats due diligence as an inconvenience, that tells us something.

How Should Investors Stress Test a Real Estate Deal?

After the operator review, we move deeper into the deal. We study deal sourcing, market research, sales comps, cap rates, submarket trends, demand drivers, and supply risks. We stress test rent growth, expenses, exit assumptions, financing terms, renovation budgets, refinance risk, and execution.

This is where many investors have been hurt over the last four years. Multifamily looked easy when cap rates were compressing, floating-rate debt was cheap, bridge lenders were aggressive, and rent growth assumptions seemed automatic. But when rates rose, expenses jumped, rents flattened, and refinancing became painful, many deals that looked conservative in a pitch deck turned out to be fragile in real life.

In many cases, the risks were visible. The problem was that they were not taken seriously enough. Floating-rate debt without adequate protection. High loan-to-value leverage. Optimistic rent growth. Thin margins. Weak sponsor co-investment. Aggressive fees. Limited transparency. These were not mysterious risks. They were due diligence issues.

One of our team members once flew to Texas to perform due diligence on a popular potential investment opportunity. From a distance, it had momentum and social proof. But he showed up in person. He asked hard questions. He pressed for evidence. And he refused to be swept along by strong current yield.

He realized something was very wrong. The operator’s answers were incomplete. The staff was clearly uncomfortable. They nervously mentioned that no one had ever asked most of these questions. Questions that he thought were a normal part of due diligence. The operator, the mayor of his small Texas town, never replied to our team member’s emails or texts again.

He concluded it was potentially a scam. We walked away. This was a hard and, at the time, disappointing decision.

Many investors later lost hundreds of millions of dollars in that popular investment. It would have cost our investors dearly and destroyed our company if we had proceeded. 

Why Should Investors Be Willing to Walk Away Late in Due Diligence?

One of the most important lessons we have learned is that due diligence is not finished until the money is wired. A deal can look attractive for months, survive multiple rounds of review, generate internal momentum, and still deserve a no at the eleventh hour.

We experienced this recently with a student housing investment. We had spent significant time, energy, and money. The temptation was to keep going because we were already far down the road. Behavioral economists call this Sunk Cost Bias. Munger would probably just call it stupidity.

But our checklist did what a good checklist is supposed to do. It slowed us down. It forced us to look again. It helped us separate the desire to finish from the duty to protect capital. We found enough concerns that caused us to walk away. Not rationalize. Not “get comfortable.” Walk away.

I had to make the phone call to 115 investors who had already wired about $10 million. Though I was initially apprehensive, the vast majority were thankful for our decision.   

A disciplined no preserves capital, bandwidth, reputation, and sleep. It reinforces the culture investors should want their managers to have: We do not get paid to be busy. We get paid to be careful.

1,137 Reviewed, Six Invested

Last year, we reviewed 1,137 deals and invested in only six. This is because our job is to find every possible reason to say NO. Our role is to protect investors from the many ways a deal can go wrong.

Most deals do not fail our process because they are obviously terrible. Many are interesting and have good people involved. But a good feature is not the same thing as a good investment. We may pass because of leverage, market risk, unclear reporting, weak alignment, inadequate reserves, operator capacity, aggressive underwriting, poor downside protection, or because the investment is outside our circle of competence.

Buffett and Munger built much of their success by avoiding major mistakes rather than swinging at every pitch. Real estate investors should take that seriously. One catastrophic loss can wipe out years of good decisions and interrupt the compounding that creates multi-generational wealth.

Due diligence is not glamorous. Sometimes, the best investment is the deal that never enters the portfolio. Those invisible victories matter: the deal not done, the scam avoided, the operator rejected, the assumption challenged, the refinance risk identified, and the 11th-hour no.

A Final Word to Investors

Do not be impressed by confidence alone. Be impressed by clarity, humility, and operators who can explain their mistakes. Be impressed by managers who show you what they passed on, not just what they bought. Be impressed by people willing to disappoint you in the short term to protect you in the long term.

The goal is not to eliminate all risk. That is impossible. The goal is to understand risk, price risk, structure around risk, and refuse risk when the reward is not worth the potential damage.

We’re honored to be listed on the Invest Clearly platform because their mission aligns closely with ours: helping investors make wiser, more informed decisions before they wire their hard-earned capital. Invest Clearly gives passive investors access to something that has historically been difficult to find in private real estate investing: candid feedback from verified investors who have invested with the sponsors they are reviewing.

That kind of peer-sourced insight does not replace deep due diligence, but it plays a powerful role in the process. It can help investors identify patterns in sponsor communication, transparency, performance, investor care, and alignment.

In a private market where polished pitch decks can sometimes hide real risks, platforms like Invest Clearly bring greater transparency to the process. And that can make all the difference for investors.

If you would like a copy of our comprehensive Due Diligence Checklist, please contact me: paul@wellingscapital.com.  You can also request a recording of our July 2^nd webinar, where we will discuss how we evaluate operators, stress test deals, identify red flags, and seek to protect investor capital before it is ever placed at risk.