Trashcade. The cardboard arcade cabinet. Whatever floats yer boat, dude.
Raid the nearest dumpster to get some suitable boxes. Look for sturdy, clean, intact boxes that don’t smell too bad. Get as many as you can cram into your car. You can’t really be sure how many you’ll need for a nice cabinet.
what a waste of a perfectly good portable house :). Unique idea, crappy real world use. Cardboard is too weak, and it’ll only last a few months before it starts to warp from the surrounding moisture. If I were him, I’d reinforce the cardboard with some duc tape and staples.
The Duc tape idea is jenius Ichy. It’ll make it waterproof too, just in case you get a leak in the roof. :-)