Surprised he didn't say he wanted a Corsa....that's a typical
young stud's 'acceptable' mode of 'street' transport.
Thing is....you'll be the one paying/buying whatever he has,
so you set the criteria. Sit him down and ask him does he really
know what 'street cred' is going to cost him ?
And does he want a car for transport, or just for the 'street cred' factor ?
Get him to get insurance quotes for whatever cars he fancies or thinks
has 'street cred', don't offer to pay it. And when he's done that, sit him
down again and talk thru/explain all the other running costs of fuel,
servicing, tyres etc. Then possibly he'll see how much running a
car costs, and why 'street cred' is a pipe dream for anyone except
the rich or those up to their neck in debt.
See what he has to say or think after all that.