Why don't you go to college and study mechanical engineering? and possibly get a job with BMW.. maybe find work in Germany .. get paid to test drive luxury cars.. Or become a Pilot.. join the Air Force and become a Fighter Pilot. Think Bigger.. the world is your play ground.. :) Good Luck
First, do you have a lot of money? The car. Get the car. Keep in mind that the car will depreciate. You'll lose money anyway. The plane? Uh-uh. Every thing will break. Hopefully you'll be on the ground when it happens. And, anything that breaks will cost a fortune to repair. If you really want the plane, charter a private jet when you need one.