Forget the cost of the hunt and mount. How much will it cost to buy a room big enough to put the damn thing in? 
FQ13
If you have to ask, you can't afford it.
The guy who owned the WY ranch where i learned to work cows made his $$$$$ in vinyl siding in LA or SF. He was a youngish guy, had a trophy wife, and was an avid hunter. He had a house where he and his wife lived about 5 miles from the road, a nice patio, and to the side of the patio, had a trophy house. The trophy house was 40-50 feet square, 2 stories without a second floor or internal posts. Every square inch of the place was covered in stuffed heads and animals, including a full-size musk ox and buffalo, about 10 elk heads, wart hogs, deer, pronghorn, African antelope of a number of species, etc.
He sold the whole ranch to the WY National Guard a few years back - I always wondered what he did with the stuffed animals.