My room is about 12x11 or 12x12. I have two book shelves that are roughly 6ft in length 12 inches deep 30 inches wide, one is a bit bigger and built a lot better than the other and has (including the bottom) six shelves while the other has five. The bigger one has five shelves for figures the other has three. Than I have two wall brackets with five shelves on them both. I also have a single shelf above my TV, which has four GSC figures in front of it. My desk, which is L-shaped, has quite a few on it too. Basically I organize them very well.
I have room for two more wall shelves but I will have to take down some clear files I hung up first, but after that I won't be able to fit anymore in here.