Interesting idea...
I would start working on friends bows right away to start learning how to tune a single cam verse a double. I would also contact the vendors like Hoyt, Mathews, PSE, ... to see if they have some type of training and certification. Just make sure you tell them you do NOT want to sell bows just work on them. I would also start investigating carts that can handle 500 lbs and be towed behind a bike. Heck you could design your own, copyright it and build your own.