Over the last few years, I've picked up a few tin/sheet-metal buildings at various craft stores. Roughly O-gauge, they work well with toy trains, especially prewar and postwar where realistic graphics aren't critical.
This one was acquired in 2018, and would look great under the tree or on a holiday/winter-themed layout:
File comment: Modern tin/sheet-metal building.
Tin bldg.jpg [ 198.27 KiB | Viewed 8978 times ]
One disadvantage is that it doesn't have a hole in the bottom for a light to easily be inserted. Might need to do a bit of disassembly to get access. Certainly has a lot of potential.