I've been lurking here for a while, so thanks to all those that have posted the incredibly useful tips & tricks.One thing I haven't seen is a way to quickly regain the 100% bonus. Is this possible? E.g. using the DeLorean.

Background: I have quite a bit of gold (thanks to the WBB) but am anticipating needing quite a lot of R$ for the last 5 cars and their upgrades. Between home & work commitments, I can't guarentee that I can play every 23 hours which makes R$ farming more challenging.