Here are two buldings and a water tank built from bird houses purchased at a local discount store. Michael’s has them too. The water tank was about four bucks and the cabin was about 5.
I cut my own wood from cedar fence boards, and stain with “rit” fabric dye to look like creosote.
The roofs of the cabins are pop cans run through a crimper purchased at Michael’s. The roof on the tower is real 30 pound roofing paper. These cost about 6 to 8 dollars apiece to build. That includes the building.
They are not any specific scale, but at about 1/29 the cabins would be ok for a hunting cabin or such.
At that scale the tank would hold about 2000 gallons.
My railroad is to look at and give the idea of what it was in the early 50’s. By no means is it scale.
The windows are not yet installed in the cabins. I wanted to seal them first. I use Krylon clear matt spray.
You find cool things at Michael’s.
I figure a building’s appropriateness by measuring the door. At 1:29, it should be about 3 inches high.
I don’t see any pix.
Here are the pics. I got it working.
Very nice work Russ. I have several of the ‘bird house’ structures that are someday destined to be improved. For now they live on the indoor line and serve as best they can 
Great ideas!
Good job on those.