Horseback riding in Riyadh

Hi all,
we are planning to maybe moving to Riyadh beginning of Protected content . I would like to know if there are any posibilities to go horseback riding in or near Riyadh? I am interested in english and western style at a higher level (no beginner). Are the stables far away from the city? Is it possible to get there alone as a woman? Is it expensive to buy a horse and keep it there?
Thanks so much for your suggestions.
Isabel