My brothers not an addict of any kind, nor is he violent or abusive...he's a lovely bloke, very funny, charming, extremely friendly, just a nice all round man.
He was staying with his gf and her parents because he fell out with our parents, he and his gf where going to get a place of their own but her parents (mainly her father) asked him to stay with them because they didn't want their daughter leaving home. Her mother has "issues" with her moods and temper etc..And asked my brother to leave for no reason even though the father told him he could stay.
So yes, I suppose he's had plenty of time to find somewhere to live but didn't think he needed to so never. But now he needs to and has no where to stay in the mean time.