Build vs. buy: what my sister's lemonade stand settled

If you have one question with static inputs, gather the data and answer it yourself. It is easy now, and you should. If you have ten ideas you want to test and revise, the cost is not the data. It is the speed of the loop between question and answer.

My younger sister Mary's lemonade stand taught me both halves.

The one-question case

When we were kids, Mary opened a lemonade stand in front of our house. She gave the lemonade away for free and put out a tip jar. Because she was a little kid doing a great job, people tipped generously. Her unit economics were exceptional.

The first site-selection question was easy: where on our street should the stand go? We knew the street. We could see where people walked, where cars slowed down, and which part of the sidewalk had enough room. One place, one decision, a few observations. No research platform required.

That is still the right way to approach a known lookup. If you want to understand one corner of one county, pull the assessor records, open the map, and form a view. The information is increasingly accessible, and modern tools make a focused analysis easier than it has ever been. We sell property intelligence, and we will tell you in writing: for one known question, do it yourself.

The ten-ideas case

The interesting question came next: if the stand worked here, where else could it work?

Maybe near the beach, where the LA County Junior Guards finish around noon and hundreds of hungry kids head home. But that idea immediately created more questions. How many people followed that particular route? Did the crowd appear every day or only in good weather? Where could a stand legally and safely operate? Would families stop, or keep moving toward the parking lot? And how much demand would the restaurant on the sand absorb?

What sounded like another simple count became several facts that had to agree: foot traffic, weather, competition, walking paths, visibility, and permission to operate. Each answer changed the next question. We were no longer looking something up. We were exploring a market.

Nothing was wrong with the available information, and nothing was wrong with our judgment. The loop was simply too slow. Checking each idea meant another afternoon of observation and another small research project. The practical limit was not how many ideas we could have. It was how many we could afford to test.

That is the real build-versus-buy line in site selection. A thesis changes when it meets evidence. It moves across geographies, joins to ownership, zoning, flood, traffic, and imagery, and turns every promising site into several new questions. When the loop is slow, you do not merely get slower answers. You ask fewer questions.

The most expensive hypothesis is often the one you never tested because testing it would have taken the weekend.

Count, or wonder?

One question, asked once: build. Gather the information and answer it yourself.

Ten ideas and a thesis that keeps moving: buy the loop. The data was never the expensive part. The untested hypothesis was.

Mary never needed a national site-selection platform for her lemonade stand. But the question she asked next contained the whole reason we built one.