As far as pure money making methods go, this isn't the top. So not sure why you'd want or need to, but here ya go:
Source: Alcorius, bloodien0se, & Xronize
Hi I have a question regarding the daily sell limit. The recommended sell limit is 8 cars/30 hours. Do we start counting those 30 hours down upon selling the first car? Or does the countdown start when we sell the last car? Sorry if this is a stupid question, but it's been bothering me. Any clarifications would help! Thanks in advance!