I looked at some similar ideas a while back. Screw piles are a good option for a stable base on uneven ground. Insulation requires coming up with a compatible design for the exterior walls to accommodate 4-6 inches of insulation and then rain screen on top of that. Top and bottom not so hard. Air sealing is quite a trick to do without compromising on disassembly-ready construction by using tape. Picture windows are a challenge, there's nothing really suitable available at least at US hardware stores. Not a problem for a shed but kind of in conflict with the motivation behind the system.