Remember guys, breeding horses is MUCH different from breeding dogs. Cross-breeds and mixes are incuraged in show rings, and conformation (halter) classes are not that popular. There is not an overpopulation of horses. I actually intend on breeding dilute and pseudo-albino thoroughbred horses in the future, and make enough to support my dogs and Dalmatian breeding program. (which is almost always takes money and is only to be done with extreme caution and only to better the breed.)
If you are ready to take care of a mare in foal (and remember, they can be ridden almost up untill they foal) and have a little extra money set aside in case of medical problems, it should be ok.