absolutely. I totally agree... to a point though.
But for those who may not know the true total cost... well.. there it is.
However, lets say you put $20,000 plus the $3200 you have to pay at the time of order (which I would think most people believe is a reasonable/ sizable amount of $ for a down payment. Lets do the math for the same 84 month Loan at 3.99%;
Its $58,160/incl 13% tax ------- or ------- $794.71/month. Plus insurance and electricity.
But! The cost of the loan is still $8,595.65 effectively raising your total FINANCE price to $66,755.65
This is of course without the $14,000 rebate. (I wont include the rebate in these numbers because Tesla will not apply the rebate to the purchase price of the vehicle and therefore the $ will have to come from somewhere else. ie. another short term loan in which you have to pay interest on)
Again there is no guarantee the rebate will be here after the election so these calculations still apply to everyone.
More in the reasonable(ish) monthly payment realm.... However, because you bring up the point of "financing almost the entire car over 84 months at 3.90% is a bad financial idea", which I totally agree... Lets do what most people should do when financing ANY car and have a 60 month loan and see if another financial institution will offer a more reasonable rate of 2.99%.
With the same down payment as before effectively $23,200
Its still $58,160/incl 13% tax ------- or ------- $1,044.80/month. Plus insurance and electricity.
But! The cost of the loan is now $4, 528.04 effectively raising your total FINANCE price to $62,688.04 (So you save A LOT on interest, but your monthly payments are much higher)
This is of course without the $14,000 rebate. (see above reasoning)
HOWEVER...
If you invested that $20,000 into a mutual fund or whatever... you could (theoretically) actually make MORE than 2.99%. So it's a worse idea financially to put that $20,000 into the vehicle (which is also a depreciating asset and locks in your potential earning at 2.99% less the depreciating value of the asset)