I have bills and a mortgage and I don't make a lot of money.
I don't know if I'll be returning to Faire next year, much less jousting.
All very good reasons NOT to even think - however fleetingly - about buying a five year old percheron/quarter horse. Even if he is beautiful. And sweet.
He would need a lot of work to be joust-ready. Probably a couple of years' worth. So...