If you listen to Bryan and Walt's podcast "Tell 'Em Steve-Dave" they talk about their home lives quite a bit, especially Bryan's.
He doesn't give a shit about comics (except when he writes for them). But apparently when a member of Alpha Flight came out of the closet, he bought every issue he could find.
He lived in LA for a few years not too long ago and actually managed the Secret Stash they had out there. But once he left Kevin shut it down, because he didn't want somebody he didn't know running it.
The jokes about living with his parents aren't that far off from the truth. I'm not sure that's still his situation, but it definitely was when they started the podcast.
He's never said how he makes any money, but he does have the means to travel a lot, so who knows?