You know.. he isn't a bad horse at all (other than maybe being cranky.. LOL). I think he will jump OK (not Grand Prix but adequately). I doubt he will have huge scope. He is a bit camped under behind, but his hocks are nice and low and so are his knees. He has substantial enough bone though he looks like he could use some work to build his abdominal muslces (trotting up hills on a long rein and you in a two point.. 5 days a week.. plus caveletti.. work up to 8 poles in a row trotting with the poles 12 inches off the ground).
His neck is set a bit low and with those prominant withers, be sure your saddle fits right and does not hit him in there.
Have you considered low level eventing?
There is something about the outside of a horse that is good for the inside of a man. ~Winston Churchill
) Dinosaur Horse Trainer