Just finished my build and did the initial testing. Works wonderfully. The whole thing cost me less than $30 since I had a few of the parts laying around. I used a deep double gang box from home depot that required no cutting at all. Plugged in the refrigerator and light and all seems well. Trying a couple of temperature changes and watching it over time. Still need to finish the heat lamp setup as I am just using a clip on light for now. Just a test, not fermenting.
Thanks to the OP and others for their guidance.