If you are a versatile coach who can work with anyone, you are not thrown off by ANY set of constraints. Client doesn't want to meal prep? Cool, they don't have to to see results. Don't want to cook at all? No problem, you will guide them to eat out and purchase prepared foods that will allow them to reach their goals. Find calorie tracking triggering? Forget it then. Multiple injuries? You can build a program around that. No gym membership? At home workouts, here they come!