People work pounds off their ass buying and maintaing these cars. If you did get a Z, youd probably max your $500 credit limit credit cards maintaing it before you had to sell it...And thats if you took care of it well.
Why dont you wait until you graduate HS, go get yourself a job and take out a loan from the bank. On the other hand, I hear trucks that your parents bought you are a bit cheaper to own