I wanna first give credit to jas0420 (and his wife) for this idea. I wanted to build a fermentation chamber inside my house, but didnt want it to look like well... a fermentation chamber.
A lot of luck occurred for this project to happen so inexpensively. A buddy donated the window ac unit, and I found these cabinets at a habitat for humanity warehouse, nearly new, but for $80, it look better than anything I could make.
I use 1/2'' foam board insulation, and particle board for the top.
After 2 days, I was able to get my test carboy down to 48 degrees!