Little Home To Be Moved

I have a cabin that was built on skids to be able to move. It is 2x10 I joists, 5/8 drywall, super high end carpet and vinyl, bath has shower, toilet and sink, has a 8 gallon hot water heater, all done with copper industrial thickness pipe, super insulation through the whole thing wasn't going to sell it but I don't need it. It was built with being able to move it in mind. It has a nice double pane rear sliding door, metal front door and a bathroom door. It would work perfect for a man cave or office, or a rental if a kitchenette was put in but has a refrigerator, and microwave already comes with everything in the pics if wanted. My brother-in-law was living in it for about 9 months and it cost almost 18k to have built and is super energy efficient and was costing us $20.00 per month for power including heat and him having tv, computer and Xbox running 15 hours a day. The heater works well and barely ever comes on with all of the insulation in it and it is a 12'x20' with 4' porch after that.