I had my 20' moved with a rollback wrecker. Easy Peasy

It's worth every penny to pay the man with the trailer made for moving these or small buildings to do it.... in the NE Texas area, I have a contact that has moved two for me, and he's great. That trailer is amazingly purpose built for these things ,,,

I have built several cabin type containers when working at Campbell Containers near Clyde. My favorite build for hunting cabins were done on a 40’ HC double door. I framed out 24’ and left the back 13’ open for storage. You could drive a UTV in this area. Here are a few pics of my last build. I did not put any windows in. I have in the past including AC units.