How big is your train room

[Lester Perry]

My train room is just short of 9X13 with a separate shop (about 11X11) for all my tools, both modeling and general household projects.

My wife has offered me another room in the basement but until yesterday I hadn't figured out how to utilize it since it would be out one door and around the corner into another room. Yesterday I figured out that if I put a helix in the second room I could have a bi-level layout. I'm still weighing the pros and cons on that idea. Using the second room would also involve punching a couple of holes in a block wall.
Tom

I have punched a hole in a block wall. If you do you will need to seal the hollow block above it because debris will fall onto the track. Not big stuff dust and moisture. It is a big pain in the a.... I used a piece of rubber.