A new Viper depending on how good of a price you get will set you back from the high 60's to low 70's. In about 3-4 years it will be worth about 50 depending on the economy at that time and the availability of used Vipers. If you keep the car for three years therefore it will cost you roughly
70,000
- 50,000
______
20,000
Divide that by 36 months.
555
Figure in interest
60,000 * 7.0 / 1200 = 350
Resulting in $905 a month to own the Viper.
Since most financial people are probably not going to believe the residual value of the Viper or are not going to trust the economy to support such resale value, in order to keep you from being substantially upside down you're probably going to have to pay about 100 to 200 more a month depending on how long of a term you want on your loan.
If you're looking to eventually pay it off then
each 10K is going to cost you this much depending on the length of the loan in months and an interest rate of 6.5.
10000 24 ($445.46)
10000 36 ($306.49)
10000 48 ($237.15)
10000 60 ($195.66)
10000 72 ($168.10)
10000 84 ($148.49)
10000 96 ($133.86)
10000 108 ($122.55)
10000 120 ($113.55)
Obviously three years ago had I paid the Viper off and not had my money in stocks I would have been financially better off. If I would have looked at my situation one year ago it would have been the other way around.
Good luck