Hi, my female Sulcata is now about 50-60 lbs and too big to carry inside during the winter nights that it goes below 60' here in FL. I'm looking to build her a night box/enclosure with some sort of heat and need some ideas. What worked/didn't work for you? We have been putting her in our laundry room in a large bin during those chilly nights but want to offer her something outside( she has free run of the backyard and a large hole she goes in under one of our shrubs) that she can go into and come out of as she sees fit, not shutting her in. Need to provide some heat as it can go into the 40's at times here, occasionally 30's. TIA