Unlimited Money
If you have no Carrier game you must create one.
Now close the game.
Go to C:\Users\{NAME}\Documents\My Games\FarmingSimulator2017\savegame{1-100}.
Open the file careerSavegame.xml with an text editor.
Now search for the tag money. You can press CTRL+F to open the search menu.
Now you can enter a custom value of money.
Now save the file and start the game.