Ok, it is bad when I'm at the grocery store and walk past the refrigerated displays for dairy and such and think "hmmm, I wonder if I can get one of those cheap and turn it into a highland chamber?"

Those cases with the doors on them where you get your cold, but not quite frozen stuff would be great if you took the shelves out. You could still see the plants through the door. It'd probably be cheaper just to buy a house on a mountain in Borneo though.