Well, it sounds kind of interesting, but our state homeschooling law says that of the 1000 hours required yearly, 600 of them must be in our own home with me as the teacher, in the basic subjects described in the law. So that cottage school idea may not work for me since I am guessing that most of your teaching would be done by those teachers and somewhere other than your home – I am not sure that your definition would qualify it as a homeschool here.
Who would decide what subjects, who is teaching, are the teachers getting paid, where it is held…etc. Can that still qualify as homeschool, or would that go into the private school sector?
Have you checked your laws/regs to see if you have any restrictions or specific guidelines? That might give you a direction to head as you try to get something going… I really have no idea; I am just thinking out loud. =)