I have a 2012 Rubicon w/ 3" lift & 35s (soon to be up for sale). And I've had a LR RWD 3 for about a year. I agree with others in here that are cautious to recommend the 3 for your use case. It will go anywhere that any other mid-sized sedan will go on dirt roads, etc. and you can evaluate the storage space by going to see one in a showroom & looking at specs. The only advantage it has on those two fronts that it has is traction control that can't be matched by an ICE. I live in a Denver suburb and my RWD LR is the best car I've ever had in the snow. It's It's not even close. My wife's previous car was an Infiniti G37x (AWD) and The RWD 3, with similar tires, is better. It's much better than my Rubicon with Goodyear MTR's... except for the ground clearance issue. I've 4wheeled on trails with 3+ feet of snow in the Rubicon so I know what it can do. But, on the street, where ground clearance isn't usually an issue, the 3 is
much better.
Also, I've road tripped in my 3 to Pennsylvania and in my wife's 3 to Reno, Tahoe, Sacramento & San Francisco (a couple of weeks ago). Road trips are almost as convenient as an ICE as long as you plan ahead or stay near interstates where there are plenty of superchargers. It does take longer but it's really not that big of a deal IMO. In the big picture, you trade the extra time charging on road trips for never going to the gas station at home. And, the seats are comfortable and it's relaxing to drive on the highway, especially with AP. It's one extreme to the other coming from a Jeep.
You said that you spend $400/mo. in gas. I spent around $250/mo. when daily driving my Jeep. I now average about $30/mo. in electricity for similar driving, not including road trips. My off peak rates are <6 cents per KWH so YMMV. Supercharging costs around 24 cents per KWH depending on the state.
I noticed that gas was around $4 when I was in CA (it's <$3 here). You can do the math & figure out the difference. I get around 3-4 miles per KWH in the 3 depending on the type of driving. I'd suggest that you use 3 miles per KWH to be on the conservative side and then any surprises will be happy ones.
Plus, my Jeep seemed to have a $1000+ repair or maintenance issue at least once per year. JEEP=Just Empty Every Pocket.
The only expense on the 3 so far has been tires... snow tires as I mentioned + I already burned the tread off of the rears on the stock tires. It's just too much fun to floor it and the crazy torque eats tires if you drive like I do.
I LOOOOVE my Model 3. So why am I cautious to recommend it to you? Any external storage (roof rack, etc.) will kill your range. And, if you're going to go "off the beaten path" it could really turn into a pain in the ass quickly. This is the part where you're really going need to do your homework to make a good decision for yourself. There's been several threads in here discussing roof racks. Make sure you get into those to see how bad it will affect range. Also, you'll need to look into charging options in the areas that you want to go. A regular 120v outlet will add ~1% to your battery per hour. A level 2 (or 240v outlet) can add up to 10-15% per hour depending on amperage. This is fine for overnight charging but it'd really suck in the middle of a day trip. Since you're keeping the Jeep, maybe you'd be happy just taking it when you're camping & using the 3 for everything else.
Good luck!
