There are several things to consider when launching or growing a personal trainer business. Among the most important are your target market, how you will acquire clients, and what you intend to charge. Having some high profile clients that would like a full-service treatment of diet, exercise, and lifestyle optimization may mean only having a few small clients on a regular basis. In contrast, charging a smaller fee for a larger number of customers means a different business model is required entirely. Investors realize this and the nature of how you shape the company will fundamentally determine your potential.