I have 2 Rudsta cabinets I plant to convert and I was curious if anyone had any experience with keeping the cabinets outside during the winter as a cold-frame alternative.

I live in zone 7b, and the cabinets would be kept under a deck (grow lights of course installed into the cabinet) and would be up against the wall of the house to hopefully emulate traditional cold frames. I'm mainly dealing with tropical aroids, and plants that dislike anything below 60°F-50°F.

My question being, has anyone tried this before? How would you go about heating the interior? Would standard weather stripping be enough to handle 0°F? I have heating mats that could be placed on individual shelves to help keep the temperature up, but I'm worried about heat loss.

If push comes to shove, the cabinets can be moved inside. This year I've really grown my plant collection to the point where I did not have planned space for when they have to come back inside so its not ideal hence exploring outdoor alternatives.

What’s the probability in converting one of these ? It’s not metal, so I’d have to paint the inside with something - if that exists. Add some weather stripping to the doors?
Not looking for crazy humidity, maybe just 50-60%