When we were asked (by another person just starting up a Large Equestrian Centre) "Where do you get your lesson horses from?"
"You just don't go out and get a good lesson horse, you have to create it (train it) yourself" was our reply.
We have been successfully training horses and ponies for over 40 years
However, we no longer train horses that we don't personally own.
Good training Guidlines to follow ->No rider on your ponies back till it's >4 years of age (only trot, canter & trotting cross-rails at 4) ->No jumping till your pony is >5 years of age (until growth plates have converted to bone at 5 years ) ->Also limit the weight you put on your horse/ponies back to 15-20% of their body weight.