Equine Therapy Horse 16.2hh TB 9yrs Gelding

Im wondering if you could help this lovely gelding find his new home, ideal for groundwork for Equine Assisted Learning programs or just a companion.Don is a 9yr old chestnut gelding 16.2hh Thoroughbred off the track for 3yrs.I have had him for a year, just jumped on him without being ridden after a year spell. I then started using him for Equine Assisted Learning and Vaulting but after using the vaulting roller on him hes ended up with a sore back and now doesnt feel safe to ride as goes to pigroot and kick out with just pressure of leaning on his back even after chiro/massage treatments.Sooooo, he would be a project to get back to riding, otherwise a great groundwork horse for Equine Assisted Learning and he has a fun personality, super cuddly, great to groom and really lovely to lunge.Would you or anyone you know be interested in him for $500 and Im happy to deliver him to you?