Delidog knows a lot about horses and you might want to PM Dukedogsmom because she owns and boards a horse named Flair.
She would probably be able to help you with real numbers since she has owned Flair for a number of years.
You also may want to look at horses on Petfinder or other horse sites for ideas of what kind of horse you want and how much you want to spend on the initial purchase price but remember the cost of upkeep is more than the initial cost. You might also want to look into leasing a horse before you buy to be sure it is one you want. Good luck!