I would do a mount with the hide and head attached like that gentleman posted early in the post. On the other hand I bet if you let this guy do the shoulder mount and really convince him that you dont have any money(I am sure you do but its a great bargaining tool) If he really wants to take your deer to shows you can be garanteed of 1# he will do the best job he is capable of. 2# he needs your deer to enter into competition or to show off. Let him know your situation, there is always room for negotiation. especially if you have something he wants. but anyway I would get the skin and head mount if you can weasel a smoking deal out of him(and I bet you can).