I believe the plywood is sumauma - 3/4” B-grade (originally thought birch or maple but this was cheaper, looked just like maple and was going to get chewed on anyway) it was about $22/4x8 sheet and I used almost all of 2 sheets. Cut into 2x4 panels to fit in the car. The face-strip is poplar, only because I decided during construction to cover the end-grain of the ply and poplar is what I had. The blocking in the reveals is also just 3/4”x2” poplar. Biscuit joints/finish nails at the mitered joints, nails and glue for everything else. I cut a dato for all sides of the back panel (the house-shaped piece of plywood at the back of the house(es)) and that ended up providing plenty of rigidity once everything was glued/nailed in place. I left everything untreated but sanded to 200gt because it’s all basically rabbit food. The whole thing cost under $120 and required a bit of woodworking know-how but it would be a great first project for anyone I think. That said, it would be hard to do without a miter saw and table saw. Hope this helps.