Hello /k/. I am currently living out of my modified car on a month-long posting for my job. It's an old SUV that I modified to put a bed in the back, which flips up to reveal a sink and running water from a 5 gallon tank. A solar panel on the roof provides power to a small battery bank and there's a diesel heater that keeps me warm, and I cook meals using a 12V rice cooker and freeze dried rations. I shower at the planet fitness.
Two weeks in, everything has gone well so far, but there's something that bothers me. The area is pretty low-crime and since my car is old and a manual transmission, I haven't really worried about anyone breaking in. But I should be prepared. I have a hunting knife in a sheath next to the bed and if I hear a window break, I'm going to lie very still and then stab the intruder in the face when he tries to get in. The sleeping compartment at the back of the vehicle is separated from the two front seats by a curtain, and all of the other windows are covered when I'm in my sleeping bag. I have a shotgun at home but figured it would be too cumbersome and I don't want to put holes in my car. What is the most viable way to defend myself in such a confined space on the off chance that someone breaks in? Also, Is fatally stabbing someone who breaks into your car not knowing you're sleeping inside acceptable from a legal standpoint?