Not trying to brag, but if you have the money build an insulated steel garage and put a door on it. That is what we did and with where we live it saves us from having to winterized. Here is a picture of our Seneca in front of our barn and a couple of others showing the door and it inside. This also doubles as my husband's shop and garage for his John Deer Tractor, Kubota as well as a few other things. Nice to have for sure.