Wasn't sure where to put this. They aren't Joe, and they aren't really ready to go straight off the shelf, so Off-Topic or General Customizing could also fit the bill. They are however, Joe scale (from what I can tell anyway, I don't carry Joes around with me as a habit, and I don't think pluv would appreciate me opening up his 50th Snow-Job/BAT pack just for size comparison) so here it lays. Feel free to move it if need be mods.
Anywho, I was at Michael's buying some spraypaint and wandering around I ran into these:
They're wood, they hinge in the center and close with a clasp. Each one has an opening door/drawbridge. The castle was 24.99 and the Train Depot, House, and Barn (not pictured because it was the least in scale and kinda lame) were 29.99 each. They're simple, but I think they'd be a great starting point for some cool dios. And the folding bit helps keep them contained and compact, which is cool in my book. I got a 40% off a single item coupon when I paid for my paint (not active till next week though) so expect a more in depth look soon. At least once I decide which one to buy . . .