Mabey I'm misunderstanding you, but why would sponser fees scare away potencial team members? The sponsers would be paying them, not the bowlers.
I agree that shirt costs would probably be high enough to keep alot of people from signing up, but that's why I am planning on the sponsers paying for them. Part of the reason I made this thread was because I don't want to set the initial sponser fees to high to get the potential sponsers to buy into this. As far as shopping around at differnt bowling centers, I'm in South Lake Tahoe, CA and this isn't a big city with multiple bowling centers. The next 3 closest Centers are all 40-50 minutes away. The guy at the Center here said all or part of the $15 per week fee for the bowlers could be covered by the sponser fees, but even for the shorter summer leagues that would really kick up the sponser fees.