I have 3 old freezers that I used to keep hot water in for a business thing. They're gutted, sealed, and have a water heater and thermostat installed, plus a drain pipe, as it stands. They've got their original insulation intact. I haven't used them in quite some time; I though, 'what about installing a wafer thermostat in place of the water heater, adding a few lightbulb sockets, and a fan in the drain pipe?' Has anyone tried anything like this? I enjoy hatching 50+ eggs at a time.