Suppose somebody offers me a property that produces almost no cash flow today. But the location is excellent. Development is moving that way. Land values have been rising. There may be redevelopment potential. Five or ten years from now, this thing could be worth considerably more. That's essentially the dilemma in this deal. Would I buy it?

The easy answer is: “No cash flow? No deal.” I don't think that's a serious answer. But neither is: “This area is going to explode.” Okay. How do you know? That's the part that interests me.

Nobody with any sense buys a piece of land completely blind and then sits there praying that civilization eventually arrives. At least I hope not. People buy because they believe they know something. Maybe I know the zoning. Maybe I've studied where roads and utilities are going. Maybe I know what's being permitted nearby. Maybe population is moving in one direction and construction in another. Maybe I've watched developers quietly assembling parcels. Maybe I've spent twenty years in that particular market and recognize what's happening. Or maybe my friend Louie knows a guy who knows a guy who had lunch with somebody at City Hall.

Now we're getting somewhere. Because there's an old version of real estate investing that sometimes sounds remarkably like a hot tip from a bookie: “Trust me. They're going to develop out there.” Two connected, wise guys nod at each other. One buys the land. Five years later he's either a genius or he's still cutting weeds.

But I don't dismiss the old guy's method completely. Maybe those relationships are his information system. Another investor might reach the same conclusion using zoning maps, permits, demographic data, transaction histories, infrastructure plans and every database he can get his hands on. He calls it research. The old guy calls it knowing what's going on. They may not be doing fundamentally different things. They're both trying to reduce uncertainty.

And that's where I think the usual cash flow versus appreciation argument misses the point. We're not really deciding between "earn a little" or "earn a lot". We're deciding: "How much uncertainty am I willing to accept for the possibility of a larger return?"

The property producing $2,000 every month gives me something I can see today. The break-even property may give me considerably more tomorrow. But tomorrow owes me nothing. Even if I “know the plans,” I don't really know the future. Plans change. Politics changes. Roads get delayed. Zoning decisions change. Money gets expensive. Developers pull out. And sometimes everybody knows exactly what's coming - which means the expected upside is already sitting there in the price I'm being asked to pay.

So I want something more than: “I know this area.” I want to know what my investment thesis actually is. What exactly has to happen for me to make money? What evidence tells me it's likely to happen? How long can I afford to wait? And here's one I particularly like: What information would make me admit I'm wrong?

If I believe development is moving west, what happens if permits start moving east? If I'm counting on rezoning, what happens if it doesn't happen? If my thesis requires a new highway interchange, what happens if it gets delayed five years? If every piece of contrary information merely produces another explanation for why I'm still right, I don't have an investment thesis anymore. I have a religion.

The same skepticism should work in the other direction. A property producing cash flow today isn't automatically safe. Maybe the neighborhood is deteriorating. Maybe the roof, HVAC and plumbing are preparing a coordinated attack on my bank account. Maybe today's rents aren't sustainable. Maybe I'm collecting $2,000 a month while the underlying asset slowly becomes worse.

So I don't think zero cash flow automatically means speculation any more than positive cash flow automatically means a good investment. The real question is: "What am I being paid for the risk I'm taking?" Maybe I accept very little uncertainty and earn a modest, predictable return. Maybe I accept more uncertainty because I have strong evidence of a much larger opportunity. Both can make sense.

What scares me is accepting enormous uncertainty while convincing myself that I have almost none. So if a property makes no money today, I don't immediately ask: “Why would I buy this?” I ask: "What do I know that everybody else doesn't?" And then I ask the more dangerous question: "Do I actually know it, or do I just really, really believe it?"