I think youre on the right track but you missed THE main, and most important question, how much do YOU need to make in order to support your lifestyle. Once you figure that out, then work back to figure out how much you have to charge and how people must move through the doors.

I cant see making a living on your numbers, but maybe if you can gross $600 per client and you can maintain a constant 2 people per week and you dont have any issues or breakdowns or problems you might make it. . .