These are good questions, my reasoning for buying the V6 is:
I currently drive about 140 miles, to/from work, per day. That is if i do not go anywhere else. I have to buy gas every other day, three times a week at ~$50 a tank. That works out to about $650/mo.
$650 a month!? For that much in fuel, I'd be looking hard at a mid-level Model 3 as it might cost less to pay for and you probably get other benefits in Cali for having an electric car.