I found that the fastest way to start making money seems to be focusing on getting the bar out quickly, then training Moon (which is free) and getting the upgrades, starting with the cheapest, so that you have a steady income.
However, I have also read advice to focus on the Kali events, despite the initial investment, since a few of them actually give you money, and then you get the big payload.
Finally, you can literally turn Andy the Android into a cash cow to milk for money... But by the time you get there you probably won't need money anymore.
What is your favorite quickstart strategy? Other than the money cheats :P