He's beautiful ! And you are obviously a committed and caring owner. Between your physical challenges and his, you're doing everything you can to maintain and improve his training and health, until the time comes that you are ready to ride him yourself. What a hard road for both of you to travel, but you are working hard and making good decisions, for him and yourself. Make sure you take some time to just enjoy him when you can, just riding him at a relaxed demeanor around the countryside to look and enjoy nature will be helpful to your health as well as his.
Even though others will be riding him to progress his training and you have your own health issues to deal with, just riding him when you can, on calm, relaxed hacks, you and he will form a bond of trust with each other.
Even though others will be riding him to progress his training and you have your own health issues to deal with, just riding him when you can, on calm, relaxed hacks, you and he will form a bond of trust with each other.