Kaparn – I am very impressed with the way you are dealing with the project. I just did a search on Blocket using ”Bortskänkes” and found a lot of things you should be able to pick up that could be used as a replacement, one was a ”Kioskbyggnad”, which may be the easiest to move. Search for ”Kioskbyggnad Bortskänkes”. There are also a number of caravans being dumped.
I am looking forward to hearing how the project goes and if you will be setting up a fund to help restore the ”Husbil”.