Try to beat the game at about level 40, by doing a mission, exp,oring the planet, then some side missions, and explore planets,once you are at about level 37+, do the final mission, then beat the game after you look at everything, you should be around level 40, if you start a new career, choose the same person when you are given the choice to, now you get tons of money, this way, I got more money than I could spend, the maximum I think is 99,999,999,999 credits