"Splurge" on the Model 3 because is it driven so much?? I don't know about the difference between gasoline and electricity prices in Maryland of course, but in Europe the 'consumption' of a Model S is around the same price as 3 liters of gasoline per 100 km (which is about 3 times less than the consumption of, say, a BMW 5 series or Audi A5). That (plus certain tax incentives) makes the Model S (with a sticker price double of that of a BMW 5 series or Audi A5) actually generally cheaper than a BMW 5 or Audi A5 (break-even is at around 30,000 km per year). Model 3 would certainly win that battle even if you do only half of that distance per year. Add having Autopilot for 120 out of 140 daily miles you mention and it becomes a no-brainer, I would really think!
My wife and I have a policy that whoever has the longest distance to do any day, gets to ride the Model S, and the other one takes the ICE car. So actually having a Tesla can even reduce the cost of your second family car as well...
BTW: AWD makes sense in snow, of course, but winter tires are much more important (and less expensive) than AWD. We did all of our skiing holidays in the Alps with our RWD Model S (on winter tires) and the car never had any problem with snow or ice, despite its weight of 2.3 tons. It actually managed it a lot better than my former BMW 523i RWD, and at least as good a my previous Lexus RX450h AWD (both also on winter tires).