DuckDodgers-If he were in a leasing situation, I would have no issue with someone taking him to a show. I would be receiving fair monetary compensation, and they would be spending adequate time with him so I think that would be fair. It's something I would consider for sure.
Churumbeque-She does charge a $10 fee to use a lesson horse.
And yes, I am paying for shoes. In addition to his board I pay for fan usage, alfalfa, meds/electrolytes, and shoes. And, of course, vet fees. I guess I hadn't really thought of these things until now... x.x