iI'm not a teenagere anymore but, I still act like one some times. hehe.
I know it's rough (the money end of things). I started in this crazy automotive feild very young dirt track racing at the age of 14.
I now have a 14 year old nephew with a 68 short fleet. He seems to have his head screwed on straight and I hope it stays that way.
My best advise is just don't get discouraged, There are alot worse things to save and spend your money on.