Where are you bringing the horse from?? Unless its another gulf country, and you're driving then its going to be real expensive and not a great environment to bring an 'outsider' into.
Yes there are stables, but there are also horses here that you can 'adopt' for your duration, and it may not cost you so much.
TRINITY has posted something about adopting horses, where all food, stabling, care is done for you...all you have to do is enjoy the riding, and look after the welfare of the horse.
Check out further down the forum, it was posted about two weeks ago.
Angelwings.