Meanwhile you could have taken the $30,000 difference, and automatically paid those earnings that would have otherwise paid off the loan into savings, a 10K or a start-up.
Yu could also have purchased a motorcycle (for the fun) and a cheap box car (for the practicality). And let's not get into the running costs, the decision to drive every day, insurance and so forth.
Buying depreciating assets with anything but spare cash is really sad.
(When I lived in the US I purchased 2 cars - for a total sum of $2000.)