Depends on here you live, horse riding is really popular that much, I am a fellow rider and trainer. but haven't heard of a need for more trainers.
Horse trainers
I do not know what the name of horse trainers was. The name of the training ground of horses was trigarium.
143,216,001
all over the world.
CTRL
to excecise the horse, train, and make sure that the horse is in perfect health condition
Famous people come to them.
Average trainers make around 36,000$ but formal schooling trainers make about 40,000$.
You can find some cheap horse training course on Instagram at @2ndhandcourses in the bio.
Horse training, according to Wikipedia is historically used for warfare and for transportation. You can find horse trainers obviously at farms. If you are living in U.S.A you can find them in California state. They can travel any region but you pay their expenses including food and shelter.
well horse trainers earn up to $100-$200 dollars per hour
don't think there are any benefits in horse stables sorry