Laundromats might be the best small businesses in America. They are relatively simple, produce a high cash flow, require little overhead, and more. If you buy your first laundromat the right way the first time, the sky is the limit. Your high cash flow and flex time can allow you to expand into more laundromats, add new services, or even invest in other businesses. However, if you buy wrong the first time, you may find yourself struggling to dig yourself out of a hole.