I did my share of scavaging when I was in college, but nothing beats what my buddy did... We finally graduated and I got a job. He didn't and needed a place to stay. I told him that he was welcome to stay on my couch till he found something. As a joke, I walked him out to the outdoor apartment closet and said, "Hell with the couch, you can have your own room!"
The previous tenants had built a wooden shelf about 4ft off the ground in the closet. My buddy says "Hey, I think my single mattress will fit in there!" I thought he was joking, but when I got home from work the next day, he had put his mattress up top, ran an extension cord from the outdoor outlet, and setup up a TV, minifridge, Nintendo64 and a small chair underneath! Since I was on the ground floor, and it was summer, it stayed fairly cool in there, and he lived in the closet for 3 months! I wish I would have taken a picture!