I do admin work and workout with a chiroprator that has designed her own program of fitness.
We are currently in San Diego and she is thinking of expanding to Northern California. She would teach the program and then the 'trainee' would be able to teach others. We just don't exactly know where to start looking on how to train someone process.
Group training is an art form, teaching others to teach is also something that comes from years of work and expertise in the fitness world.
Possibly look at the Zumba model?