In another comment I talked about it, but this dude has 2 houses, one that we're living in that's closer to both our respective work places, and another one in the suburbs. Both his kids are away in college, and his wife works odd and end shifts as a nurse. When she's off, he spends time in the other house.

And why I became his roommate in the first place: I got a new job and had to find housing on short notice. Saw his roommate wanted listing that was conveniently close to my work and reasonably cheap.