I recommend using card stock for this one, it is BIG. Normal paper might buckle. Also, my lame printer does not go as dark as I would like, so yours may be darker (do a test print). And lastly the diagram is designed with thicker card stock in mind, so scaling it down for normal paper might cause a few issues.
Right now the roof is just sitting on the building like a lid, which makes the wiring very accessible. Otherwise it’s 95% complete. Took about 3 hours to cut and assemble.
Here is your ginormous 6-page diagram. Click to enlarge, save to your computer, and then print as-is (regular 8.5″ x 11″ paper):
There are two versions of the light, a regular papercraft one and one that you can install a light for. You’ll need an electrical friend to help with the single LED light.
Mike H. sent me some pictures of his Firehouse, which is a stunning carbon copy of mine (kinda surreal to look at it). Mike recommends creating a center support plain to reinforce the building (bottom picture). I think a couple of U-shaped cross beams would do if you need support.