I just stumbled across this 2008 documentary on Sundance Channel and I'm stunned. People squatting in utility tunnels and other underground crawl spaces in New York City subways and sewers. One guy had a sweet little pad about the size of a small RV with free electric and heating. But he also had a piece of plywood camouflaged with trash over an open manhole as his only entrance/exit and everything that he owned had to fit thru that manhole.
I was impressed with the minifridge he dismantled to get in. He had really spruced up the place with paint and all the homey touches. But he was still living in a subway tunnel utility crawlspace with no running water, sewer or lock on the front manhole.
Mickey Hand would have still nailed him on the valuation.