I have never refinanced a car loan, but I wonder how depreciation plays into the ability to refinance? When you drive any current EV off a lot, it's value immediately goes down by at least 7500 (the tax credit) plus "regular" car depreciation of several thousand. If you didn't put enough down on top of the $7500 to cover that, it might be hard to refinance. With your giant state credit, it's probably not a big deal, but in places that only get the Federal that might be tougher.
Good point. When I first started crunching the numbers, it was based on an X or S purchase but I'd probably follow a similar plan if I get a well optioned 3. I've been waiting a while and have been "making payments" to myself for years by setting aside money for a new car. I'm probably putting close to 40% down so I don't think I'll have to worry about the lower value of the car when refinancing. I guess I'll find out for sure next year when I refinance and let everyone know if it actually worked as I hope it will.