This isn’t exactly a question about home building but I am thinking of building a shed as if it were a house. Reason being is that it might spend some of it’s life as a shed and then convert to an office space. For that I am planning to build it as if it were a dwelling. I’m thinking that I would frame and sheath it as if it were a monopoly piece. ZIP on all sides including the floor deck which will be help off the ground by concrete blocks and by 6×6 skids. Blocks would keep it elevated and the skids would create a break between the blocks and the underside of the floor and allow it to be dragged to a new location. Tape all seams and insulate the cavities with some type of batt insulation on all sides (including the floor). Does this sound feasible? My only concern is the ZIP uon the underside of the floor facing the dirt. There is no direct sunlight there so it shouldn’t degrade from UV but I am wondering about the long term exposure. Perhaps there is a better way to waterproof the underbelly. Thoughts?