Every school gym floor in America is on a maintenance clock, the work can only happen when the building is empty, and no district keeps a floor crew on payroll. One guy bought into it with no flooring experience and went from 80 gyms a year to more than 300, with no advertising at all.

Cold email is close to dead and everyone knows it. One founder decided the fix was not a better subject line but a cake, hand-delivered to the office of the person he wanted a meeting with. Seven cakes went to venture firms. Five turned into partner meetings.

Churches sit on hundreds of thousands of dollars of oak that nobody in the congregation knows how to fix. One buyer spent 18 months looking for a business like this and found one where the customer only calls every 25 years. That sounds like a problem. It isn't.