There are many people that come to our site looking to downsize and build a smaller house than they have now. Maybe the kids have moved out and they have no reason to have such a big house.
Sometimes they are looking to build a small house on vacation property that they bought years ago. This is what Jim and Tracy did in Florida.

They bought property back in the 1980’s and it was sitting empty for years. They would use the parcel of land to put their trailer on when they towed it down from Ohio for a few weeks during the winter to get out of the snow and cold of Dayton Ohio.
They put a trailer on their property while they built their tiny house. This seems to be a common thing as it provides shelter and some of the comforts of home while building.