I have a couple of problems with what he quoted you. First off, it is high even considering the amount of work he is doing.
Secondly, you are saying he will paint it, and then you assemble it? If that's what you mean, then walk away.
Don't get me wrong, if you really want a premium "show quality" paint job, it won't be cheap. You will spend $7000. or better, depending on how much fit and finish you want done. Even $9000. to $10000. isn't unheard of, but 13k and you finish it up is rather insane...
