This does not sound like a good idea. I myself cant imagine any of my rooms at 50* let alone trying to keep a reptile under those conditions. Im always warm myself and my house is kept at 68. During the summer with my central air running 24/7 its 66-68 with 20% humidity and feels freezing to everyone else that comes over so i cant believe your room could really be 50. But anyway thats a recipe for a disaster. I run several quality Radiant Heat panels and they wouldn’t even be able to keep a ambient temp of 78-80 let alone a Hot Spot of 90 in a 50 degree room. You cant just use a Heat Mat on a thermostat either because the cool draft of 50 in and around the enclosure is a sure case of respiratory infection sooner or later. I think this is the wrong pet under your current situation or until you can use another room in your home that you can keep at a min of 68 degrees so you can run a Radiant Heat panel in the enclosure to get a hot spot of 90 and a ambient of 80.
Without the proper habitat they can not survive.
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