I recently started a new game on GT3, and was going to use that MX-5 Enduro to get easy money and lots of money right in the start. So I did buy a MX-5 and got me an IA-license too. Then I promptly won the enduro, and to my surprisement I got the F1 car, Polyphony 002. However, I didn't want to overpower every race available for the F1, so I sold the F1 and netted about 300,000 Cr. So I bought and Lotus Esprit V8 SE, and beat the Amateur European League. From there I got a Gillet Vertigo. So now I had spent about 40 gamedays, had about 300,000 Cr to spend and also had a Gillet Vertigo. So you could say I was ready to beat almost any race in the game. A much faster way to get money than in my first game, where I first plowed though the Beginner league, and then Amateur league, etc.. I propably didn't have that kind of money even until 100 days in my first game.