That is sort of how I got my start. Purchased a horse from a small, local breeder and did some training with his horses as there was not really anyone else to do it. He was in his 70's at that time and too old to saddle train horses. He enjoyed breeding and watching the foals mature. He emphasized ground work among other things. Very intelligent and offered good advice, although as a teenager, I was not always open to it. What he did mention in passing, I did read up on, like Xenaphon and other old school things.