Late to the party
Hi @tomma I wrote you a PM. If there still is something I can perhaps help with give me a ping. Regarding tools there are certain methods that use almost 0 tools but can still get a lot done. https://cocreate.localmotors.com/nowbreakit/epoxy-minimal-mess-small-footprint-approach/
Epoxy is not cheap (unless it is a day over shelf life - ask around at boat builders or wind power manufacturers, perhaps in Rostock) but it can get a lot of stuff done. If you put some glass fiber (ask the same people for scraps) on the cardboard honeycomb it becomes very strong (but only moderately so in compression).
You should not work where people live, and have good ventilation (wear glasses, gloves, read the fine print), but composites experience is very marketable, especially if you can work clean and precise.
Is there magnetic stuff around (bed frames, parts of walls)? If yes you can buy a big batch of magnets (the strong ones are neodym) and use them to fix wall paper, fabric or similar. They can be pretty small and cheap and still get a lot done, also for improvised electronics.
Do people use batteries a lot? Perhaps you can switch to rechargeable - with some help from Panasonic? You can build powerpacks for mobile electronics. A very basic kit will let you do a Repair Cafe and bring in more tools and parts (talk to Ifixit.com). A small amount of epoxy will also come in very handy there.