Just look trough the text and find this:
StartingCashEasy = 20000.0 // starting cash for novice level : 20000.0
and change it to:
StartingCashEasy = 9990000.0 // starting cash for novice level : 9990000.0
(If you play Medium or Hard, they are right below easy.) You can also change the salaries, Price of land, Lots more