I used mostly craft sticks for this build. With some balsa for the corners and door frames. The base is foamcore and more foamcore for the walls under the eaves in the front and back.
The roof just fits on top and can be removed for easier inside access.
Higher resolution images here.
Trees are the next big thing I tackled. And I'm super proud of them but before I finished them I had a side quest to build some objectives. So I did that next.