buddy of mine owns
http://www.detroitrollerderby.com/
Good luck in this business, you need sponsors, teams to play you, a venue to practice and compete in, you need about 50k startup just for uniforms and roller skates, you also need to be licensed and carry insurance for injury and most insurance companies won't take you on because of the nature of the sport, these ladies break bones all the time. Ambulance rides are not cheap.
I can give you all the in's and out's on this business. Finding sponsors is the hard part, if your selling porn most chances you won't get any sponsors and your business will fail, they treat this sport very seriously. I don't know how it is out in CA, but here in Detroit we have many many teams. Many teams also violate and get thrown out of the circuit.
Once you have someone break their kneck, get ready to lose everything you got. You also need to pay a promoter. Another 50k for signs, radio ads, billboards and other various promotions will be needed for various events.
I love watching this tho..
