Buy a the Ford Mustang and upgrade it. I will kick but in the beginner NA races (even against the Viper). Win enough to buy a Mercedes CK55 and upgrade it so you can win the beginner series Mercedes races. Then go to the Amature Mercedes race and win that (you'll need racing tires, I went with medium). When you win that, you get a Touring CK. You could sell that for $245K, but you can win just about anything it qualifies to race in so keep it and clean up.