Set aside from conformation is also comes into play any racing pedigree on the mare's side. I tried to look up her pedigree, but it never displayed for me. Aside from the fact that she never ran herself nor (I'm asuming) has any of her past family. The better racing pedigree you can get on the dam's side of the family tree is the strongest. If you want to get into racing, I would start with buying a horse that is already raced trained. That way you can get a feel for the sport and will not have to as much money on the preperation to get to the race.

With Arabians, they are not allowed to race until the age of 3. So, you have 2.5 years of letting the foal be a foal, then you have about 2-3months of breaking, then you have another 2-3 months of race training in hopes of the horse making it to a race. You have to consider ones with not enough speed, and/or injuries. Many end up racing training, but never make it to the race. Like Saben said, you have vet, farrier, trainer fees. The trainer fees alone are around $35-45 a day, farrier $120 every four weeks (racing plates are not cheap), and the vet.

If you are looking to make any kind of money you might want to consider a TB. There are very few tracks that race Arabians and the purses arn't all that great!