Sooooo, I'm looking at the do-it-yourself with a mini fridge, which seems to be the chosen method. Already you're losing me with the drilling of holes, and having to remove freon etc. - especially where it says "you may want to get a certified professional," which around here means I'll be spending some dough. Might as well buy something fancy & pre-made, if I have to pay a pro to help me! And seeing as I live in California, I guarantee it's illegal to remove toxins yourself. Those are great how-to links, so no offense intended... it just reinforces my original thought that making one myself isn't realistic.

How about some info on making them with styrofoam coolers? Is that an easier and less (potentially) expensive method?