The only thing I'm a little iffy on is the conditioning work. He is quite fit doing flat work right now and can do an hour of trot /canter work with short breaks and not even be breathing hard at the end. I'm just worried about how his joints will react to the increased workload (he's 5 coming 6). I might just be overly pro-active but I don't want to screw up his joints.
He gets exercised 5-6 times a week, and turning one of those into a schooling over fences day would probably get him fit enough to handle a jumping lesson 1-2 times a month without damaging his joints, right?