It is a business and needs to be treated as such. Everything needs to be documented in a contract and you need to have written policies. When my numbers have been down, I have needed to contemplate and evening part time job...whatever pays the bills. Any parent will take advantage if you allow it. You need and must expect to be treated as a professional. My families know they are paying for the spot not the attendance, if they don't pay I need to fill my spot. I have what I have been told is an iron clad contract lol.