it is possible to steal bricks and stuff out of skips and maybe even steal a bit of cement from a building site and then build a little house down an alley. you could furnish it with furniture that has been left around and about. doors and windows may be tricky but providing yourself with shelter and a chair and a mattress in this way would be good. there are loads of alleys that nobody ever goes in. imagine having your own little grand designs house in one of them