Which affordable ami?

Heyho, I’m driving an old polo at the moment, it’s enough to drive… I’m currently 18, i.e. in 1 1/2 years I’m done. But until then I’d like to save money, and then get a cart for about 2-3k. I imagined something a la Pontiac Firebird or Chevy Camaro, unfortunately they consume quite a lot of fuel and maintenance costs too. I look for something in the direction, 120hp up. In the city I rarely drive, living in the village If it theore For example, I would like to buy an old Porsche 924 BJ >78 and then take out a classic car insurance on my father? Insurance + tax I would imagine 300-400, fuel consumption max 9-10 liters. Would be nice if you have suggestions thank you in advance. Greetings, Sammy