Joe,
Have you considered a shelf layout around the wall perimeter? It could vary in width from, say, a foot to two feet wide
or, perhaps corner to corner. It would take up a 44" square maximum in the FasTrack corners and a 34" in the O31 corners with an 18" - 36" run between them.
This arrangement works nicely in a multi-use room allowing the trains to exist without intruding on space. The trains would have nice long runs, plenty of space for scenic items and be entertaining running in the background.
The deck can be mounted on pylons and the fascia for the edge of the deck can be finished to be attractive. Then, it floats, not having legs and such. heck, store bought shelf brackets could be used.
Simple track plan that would use most of the track inventory.
