We'll do the same round twice, as it seemed to work out pretty well for most everyone. (but me)
$50,000 credits to start with. Buy a car and do what you will with it up to $50k. Spend as much or as little as you like as money leftover is banked.
Race 1: 5 laps @ DRC
Take your winnings, plus the money you win and the sale of your car, except for the winner of race 1 who cannot sell their car until race 3.
Buy your second car, outfit it as your budget sees fit and race again.
Race 2: 6laps @ IRC
Take your winnings, leftover money and the sale of your car (everybody), and buy car 3. Spend it all as it's the last race of the night!
Race 3: 8laps @ Mazda Raceway LagunaSeca
NOTE: cars bought don't HAVE to be sold. You may simply find out what thevalue of the car is worth and add that amount to your total.