Be prepared to rent out your school (to dance, yoga classes) on some days to bring in some extra income. It might be necessary.
It shouldn't be. And never rent out prime time slots. If you want to rent out off hours when you don't want to have a class go for it, but if you can't put people in a prime time class and generate more then you could renting it out you probably shouldn't be running a business... 4-6 students in a class should get you more then renting it. If you really want to add something you can't do hire a instructor and "own" the program.