Do you have the box the carboy came in? Some are even shipped in foam, sorta like an ice chest....
I just picked up a 3/4 size fridge- on the side of the road. Works too, down to 20 in the fridge. 2x2x5, first planned use will be as a warm spot for carbonation. Probably boxed bottles, plus a light bulb, on a waterbed thermosttat...
Edit, to add a better variation: I'll use an old Mr Coffee, hooked to the water bed thermo. More heat, less light.
So far, I've had more experience thinking than I've had brewing....you don't think they are mutually exclusive, do you?
72 batches so far,
48 wine, mostly Loquat, peach, plum, prickly pear
23 beers and ciders
1 Tequila, from a prickly pear wine experiment that didn't work. I call it "Prickly Heat"