This is a small shed I made for my RC diorama. You can glue all the parts together, see all photos to better understand what piece goes where.
For the door you can use a rod or metal wire so it can open, or simply glue it if you don't want it to open.

You can print the base that suspends the cabin or skip it entirely and have the cabin falt on the ground.

For the flooring, you can search for a seamless woodfloor texture, and print a piece of thicker paper and cut it so it lines up inside the 3d printed base ( 82x82mm )

Let me know if you guys need more detailed photos of how to assamle it