Some of the booster parents are in the process of trying to build one for next summer at my son's school after they had trouble finding good summer exhibition options this year (boys soccer is a fall sport here). We have the support of the coach and the school, but if anyone has done this and has any best practices they've picked up, landmines to avoid, ..., I'd love to hear them. I've helped organize and run larger tournaments for a club, but this is a different animal.