I stretched to buy this car. The car my Model S replaced was a $22,000 '99 Chrysler Cirrus. I saved up for several years to get down to a loan equivalent to what I had for the Cirrus (good ol' Treadbare), despite alimony payments (which are now over, yay!). I calculated that the net cost difference was that I would be saving $100 a month in energy/fuel costs, so apart from saving a lot, it wasn't that hard. That meant I drove an old car with rust on most body panels for quite some time. It got to the point where when I met people for business, I'd park in weird spots to hide my thrift. I did all this to save about $850 a month for about 5 years. Really, I started saving when I first got word of the Whitestar being possible. In a little more than 3 years, I will have paid off my loan for my Model S.
To date, I've driven over 13,000 miles with no oil changes and no petrol fuel. I've saved about $1800 versus ol' Treadbare, not counting the usual $1200-$2000 a year in repairs for and old car. That about zeros out the loan payment right there if you combine the two savings. In 3 years, I will be saving about $4000 a year. Even if my Model S lasts a paltry 8 years total, in the 4 years I own it without a loan payment, I will have saved $16,000 back. When you add the $7500 government incentive, the total savings less what I put for my initial lump sum to buy the car means that in retrospect, I spent about $20,000 to go from a Chrysler Cirrus to a Tesla Model S, by 2020. If I own the Model S as long as I did the Cirrus (which is rust-proof, yay!), that's another 4 years saving a total of $7200 or more on fuel/oil costs (hey, how's that peak oil demand coming along?).
Yes, it was a stretch to save up as much as I did. I didn't spend lots of money on travel, and I packed a lot of lunches. I went without cable television, and I made other concessions.
Here's a sample monthly budget comparison to consider:
Budget A
Home phone $30
Hi-speed Internet $90
Mobile phone w/ high data plan $150
Cable / Satellite TV $100
Dining & entertainment budget $575
Weekly Lawn/snow service $30
Travel (year budget, divided) $350
Total= $1325
Budget B
Lo-speed Internet $50
Mobile phone w/ lo data plan $100
Dining & entertainment budget $200
Travel (year budget, divided) $75
Netflix $8
Total= $433
And that was precisely how I did it. I packed lunches regularly, went out with the family for a meal only once a week, and took the family to a movie once a month, usually shooting for a matinée. I also did a lot of house work myself. That meant I saved $892 a month. My grocery bill went up nominally, so maybe you could argue $850 a month is fair.
Learning how to live below your means is a vital skill. Getting really good at it is a little like hyper-miling a Model S on a winter road trip.