Do you have 6 B-Spec drivers? If you do create a second account and use the widget (at the link below) to run remote races overnight. You only need one driver from the secondary account to do this and it doesn't matter what his rating is (can even be zero). If you have your login bonus at 200% you can make an easy 3.8 million in only 8 hours of remote races. If your bonus isn't at 200% you can still run the remote races. Just wait till you get the bonus up to max before downloading their earnings. Ten hours will give you more then enough to buy 4 cars. All for doing nothing.
If hosting your own remote races isn't an option for you send me a FR at AFTAC_99104 and I will run your Bobs for 10 hours in exchange for a Level 23 ticket.