As far as saddle racks go, I use substitutes for my saddles...I've got a second-hand towel rack, two saw horses, and two home-made racks. I got a length of plastic plumber's pipe, threaded strong washing line through it and suspended it from the roof in my shed. This made two hanging racks. I've also got an old sofa in the shed and use its backrest to put saddles on temporarily.
If your horse is in pain, could you get a chiropractor in as well as a saddle fitting expert? Until the pain and its cause/s are assessed and remedied, it would be a very bad idea to ride this horse.
Hope this helps. I'm sorry you're going through it.