I purchased my 40k vehicle after driving a free POS for 10 years. No car payment was amazing. However, with a lot of peoples mindset on this post I guess I also shouldn't buy nice clothes, go out to eat, or go to the movies either, maybe I should cancel my cable and my gym membership as well. Each one of those items is a luxury item to some extent that has a monthly bill associated with it, similar to a car loan. However, the car out of all things actually retains some value. Everything else has no value once consumed. I would be the first to tell you I try not to spend to much money in those categories but the fact is I do a little and wouldn't change it for the world. I can afford it though along with my 40k car that I have a loan on. Let's do a simple math problem with my 40k car as an example (lets assume i didn't put anything down on it):
Total interest paid over 5 years @ 1.9% for a 40k loan = $1,962 (this is the cost of the loan over 5 years). wow what a deal.
The 40k cash you didn't pay for the vehicle invested on a municipal bond at 5% interest for 5 years = $11,051 earned interest.
$11,051 - $1962 = $9,089 net gain.
If you paid cash for the vehicle you would lose the potential to make $11,051 in interest and have all your cash tied up in a depreciating asset. I guess you can qualify for more loans though, however, you wasted all your down payment money on a car. So you can't buy anything.
Imagine investing in real estate with that money. Also, like Brian said, you could always sell the car. With that said, I recommend putting money down on all vehicles because you do not want to be upside down. I also recommend buying a used cheap vehicle but if you don't want to because you want to live your life and have fun I would finance it any day of the week. This also assumes you can actually afford the monthly payments and it will not effect your debt to income for real estate investing.
Getting a low interest loan would work better for any priced car.