Off the top of my head, sure. I'd imagine it would be harder to resell an off-grid home in suburban California, I'd certainly be hesitant to buy a home like that. Any issues could cause outages until you get it fixed, which may or may not be as quick as you'd like. Battery-backed PV systems are more expensive. More energy management would be required of the user, it's not as simple as never really worrying about whether you have power. None of those prevent most people from being able to go off grid, but they would be disincentives.