Been blessed with a nice 30 x 50 metal building with lots of extra space. Am thinking of building the layout where one runs trains completely from the outside of the layout? Imagine an oval and you run the trains by walking around the outside edge? No duck-unders and no reverse-loops. Lots of elevation gains and losses with bridges and tunnels.
Shooting from the hip... sounds like it would be fun to run the trains rather than be surrounded?