Sounds like a good plan. The worse part may be the amount of propane used in the winter so it may help if you can skirt it with thremax or some brand of foam. Maybe even put down a plastic sheet before parking it and then skirt onto the plastic to keep the moisture down. I would inspect the roof VERY closely on my hands and knees for any soft spots or bulging before you buy it. Yes, even on a new unit. I'm sure you have seen some of the posts on here about water damaged units that are 2013. Keep up on the roof/dicor inspections. Look closely around everything that's on the roof as sloppy installs will have razor knife over cuts that the Dicor hasn't covered. They may be hard to see.