To get lots of money you must first enter the code for flying cars then, go for a fly around the islands,after you have flew around for a bit pick a nice easy place to land your car (an airport works great) as soon as you land you will get an insane stunt bonus and the longer you have flown around the more money you will get when you land.(to get even more money why not do some loop the loops to boost you profits. ENJOY...