IMO its best just to have 1 car and drive it a lot. I have made the mistake of buying cars and selling them, using them for a month, and then buying a new one. Just as Schumacher has three cars does not mean you need three cars. I think the best way to get remotely good (which I am not) is to buy a car, stick with it, as the transition between cars seems to stifle learning. Maybe I have gone off topic.