Our school has had an ongoing tournament team for the last 5 years or so. While I don't participate in it, I do help out with our fundraisers.
The tournament team is open to whoever wants to make the committment. A minimum of 3 tournaments is expected if you join the team. We do regular fundraisers such as a raffle at our home tournament, host a dance for the local jr. high, and put on the Halloween haunted house for our town. The fund raising has been remarkably successful, and pays for the lodging of the team as they travel (and because we live in the boonies, we always travel). Team members are still responsible for paying for food and entry fees.
The team has been pretty successful, both in terms of tournament results and having a sense of family. The team size is usually around 10 people, though at it probably maxed at around 20. Other members of the school are of course allowed to go to other tournaments, but they don't get the benefit of having their lodging paid for.
Lamont