If you get over $500 you will get a new car.
While doing Commodities, before you leave the bus station to sell, make sure you have agun with 99 ammunition. Also make sure that you pump up Strength and Charm and lower your Karma for extra safety.
When doing the darts, go for the lighter dart board.
Start out with unlimited intelligence and get the job of the CEO. Follow the first car cheat and get to day 381. Then, press C and you should be in a red convertible.
Link play online: http://stick-rpg2.com