HexCheat:
 Find the "config.txt" file in the main game directory 
 and open it. Here you can change the costs of all products. 
 
 Furthermore, by finding the following line, you can 
 change the amount of money you start with at respectively 
 the easy, medium, and hard difficulties:
 
 startkapital(1) = 6000000 ;einfach
 startkapital(2) = 4000000 ; mittel
 startkapital(3) = 2000000 ; schwer 

 To get free items, look for the following words in the file and set the values in 
 front of them to "0":

 kaufkosten
 monatkosten