Parents and their money are easily parted when it comes to youth sports. Volleyball is probably the easiest one to do this in let me show you the process.
5K a year includes uniform, tournaments, hotels, practice time, rental bus, and coach. There is a 17U, 16u, 15u, and 13u team. Each team has 8-10 girls on it. So there is a 120K-160k a year revenue. The cost are 15-20k per team, per year. You take advantage of the parents desire for a college scholarship, along with the dad's inability to teach volleyball. Most dad's are know it all's at heart. They think they can coach (football, basketball, baseball, and softball). However when volleyball is mentioned they do not have a clue so they have no problem forking over the money.
You hire a couple of former players to coach the lower level teams. Or let a rich dad grow with the program. You train them to be good coaches. You only use the kids in your system for your best team. You scale everything. You as the figurehead make all the money.
You could even set yourself up as a nonprofit. Yes private lessons are where you start the process at.