$15,000 is a much better start towards an eventual down payment on a first home or the seed money for an IRA but I'm just old fashioned that way.
In college few of us had cars and those who did ended up being the chauffeurs for everyone else... anytime someone wanted to do a shopping run or wanted a designated driver, call the poor sap who brought their car to school. Nobody had any trouble doing normal stuff with public transit and with bicycles.
Those cars got beat up too, scratches, door dings, fender damage from crap student parking jobs, not to mention the interiors getting somewhat trashed.
There was one guy who, in sophomore year his father got him a brand new Saturn. That was something like a $8,000 car back then and it was FANCY!!! I remember him showing us all how amazing it was and how his dad took him on a tour of the factory to show him all the space age stuff they did with putting it together.
It was totally rashed out in a year or two.
Do what you want to do, but frankly it sounds like a completely foolish use of funds to me.