Somewhere I have a CTT article featuring a father and his 2 sons, living in an apartment with a Murphy style layout that was stored upright out of the way, but lowered to run and enjoy.
I remember it was 3' deep, maybe 8' x 8' table. Every accessory and scenic detail was fastened to table so all they had to so was take engine's & cars off and on from bookcase storage.
Quite ingenious idea.
When I find the article I'll post date of publication, magazine in basement library.