I have a friend who built his trophy room 2750 sq.ft. with 24' tall ceiling. He has a mountain in one corner with his sheep/ibex lifesize mounts then the rest of his mounts around the room. Has a shoulder mount elephant on one wall.
I have seen pictures of that room an it is incredible. I wish something like that would be an option but unless the wife wants to take a few extra jobs I don't see that happening.