Join Date: Feb 2012
Location: Alberta, Canada
step one, marry a millionaire.
Seriously, you don't make money at it. First, learn as much as possible about the breed, attend shows, if possible find a breeder/trainer and absorb as much as you can. Learn how to show and market high end horses.
Then research bloodlines extensively, buy the best quality horses you can find, preferably proven in their discipline(with bloodlines that complement each other), and find a great trainer. Show the horses successfully and make a good name for your self as an owner of quality show stock. Then breed a few mares, and evaluate the off spring. If your stallion or mare(S) do not produce the quality expected, rehome them and replace. Then market your stallion, breed great mares to a great stallion and hope for the best.
Be prepared to keep the foals indefinitely if you cannot find them homes.