FunHorseGames.net may be one site that is worth checking out.

Just find a horse and ride it! it's not illegal to ride a horse.

I live in Fort Worth and see people actually taking their horses to work.

It is impossible to tell from just the information in the question. The worth of any horse depends on many different factors. No mention was made of the mare. The dam's pedigree has as much to do with the worth of a horse as does the stallion's. Who trained the horse, what he was used for and was he successful in racing or the show ring. Has he had any injuries or illnesses, or is he nasty tempered. All of these things go in to the worth of any horse.

HuntAndJump. My horse club. Horse star, Although it might crash in the start, its worth it!

Quarter Horse