Modify Money - Locate the file "game.cfg" in the config folder of the
game's installation directory. Open the file with Notepad and search for
the word "money". Change the amount to 999999999 for max money.
Get Your Money Back - Go into the building mode and build a long wall.
Delete the wall and build it a second time. This time the wall won't cost
anything and if you delete it now you'll get the money that it would have
cost you to build it back. Repeat this a few times until you have all the
money you need.