I'd think of it as a 2-3 car setup. The truck is shared at my company, and my gf doesn't have a car of her own yet, so having two personal cars would be reasonable.
But what I really mean is that no one is likely to be happy with JUST a battery electric vehicle; they will want access to a refuelable car for longer trips. And, personally, I don't want to put 1500 mile trips on an $80k new car; I'd rather keep my NPV $12k 2006 audi for that kind of thing, and keep the miles on that.
For a daily driver around the bay area, though, the model s looks perfect.