Plunking down only 10% to 20% cash on a car, then financing the rest is not where most would want to be. If you are putting down $36K or $37K and financing only $20K, your payments over say 5 years are going to be very small. Those that express, just write a check for this or that, 100% cash for everything are very fortunate. That is not the real world of most people's situations, but to each their own. The finance charges are not going to be large by any stretch. Most Credit Unions, etc. are in the 2.99% range for a 60 month loan like that. 2.99% is nothing.
I say stop denying yourself any further and finance the rest, thus enjoying your dream now. If you settle for the car you really don't want, you will regret it. My motto is that you never have regrets in life. Some financing is a part of life and there are rules you can follow to keep you out of trouble or getting in too deep, even when having to finance things. Be smart and you will be fine. If you have the self control to save that kind of money in that period, then you will have the self control to simply pay off your small loan. Calculations can be run all over the map and numbers be manipulated to make any scenerio work out to your desired situation.
Good luck in your search, and stop denying yourself your dream already. Wall Street is just not a way a safe way to make money. In fact, this 401K fraud we have thrown on us is about as criminal as it gets. Yes I contribute to it, but the true profits are going in someone elses pockets. Historical BS numbers they have been trying to cram down our throat and long term stability of growth, etc. are complete BS. Work hard and make money the old fashion way, through hard work and blood, sweat and tears. Work hard and play hard. Now go grab life by the horns. Sorry that is the best pep talk I could come up with on short notice.