A "teardrop" camper I started years ago. Teardrop is in quotes because most teardrops are based on a full size bed and are thin walled and super light. I wanted a bigger bed and better construction so I took the concept and designed what I wanted in Autocad from scratch, starting with the frame. After building the frame, the deck, the walls, etc, etc. it has been a fun project! All exterior surfaces are insulated and it is heated and cooled.