...and will likely find a good home in Hawaii, no?
Unfortunately that is often not the case at all... I work for a rescue in Oregon and the younger and healthier horse is always the first choice even if they lack training. Our goal is to rehabilitate these horses and provide them with proper training before they are adopted to a new home, but this is not always the case, as people want to start with young horses. The rescue I work for prides ourselves on our matching policy. We make sure horse and owner match in all aspects (personality, training on both parts, goals, etc) before we allow an adoption to take place. We also have a policy requiring that the horses be returned to us for re-homing if the new adopter can no longer provide adequate care. We are extensive in our adoption process.
If the OP can afford to adopt this handsome man, I say GO FOR IT!! It's horses exactly like him that end up in kill auctions, or are stuck forever at a rescue. *sidenote: I can understand slaughter if he was completely useless, but he is a usable horse and the OP has a purpose for him. (I don't wanna get into the debate of slaughter) but...
We have a few elderly who have been with us longer than they should (as a rescue, of course, they will spend out their lives with us or hopefully finally find a home, no slaughter option for them, don't worry
). But also if we can't adopt them out, then they take up a spot that could be used to save another horse in need and in turn that could be another usable horse that goes to auction. *Just to be clear I am talking about sound, healthy, and good temperamental horses, not just horses in general
I think it is awesome that she has the opportunity to make a difference for the horse and her niece and nephew