I live in the city of chicago, I know the cold very well, unfortunatley. A heated shed or a designated room or basement set up for them with proper heat and safety measures is better then roaming a house for the winter months. In the summer time, a small, about 4x4 insulated tort house, look them up under leopard section or in the enclosure section would work for a night time sleeping house, with a cheap chicken wire fencing or landscaping timbers, etc easy fenced in area would be the proper way to house them in the summer time and the best for them. It is harder in the snow states, but, it's what we need to do for having them and living with snow.I wish I could have her outside 24/7, but I live in central IL and it's already starting to get cold outside
I also don't have a fenced in yard, but we spend a lot of time outside in the spring and summer and they absolutely love it.
Thanks for the info!