To change the amount of money you need:

1. Go to C:\Users\*PC name*\Documents\My Games\FarmingSimulator2019\*Save Name*

2. Open 2 files: "careerSavegame.xml" and "farms.xml" with Notepad or NotePad ++

In "farms.xml" file look for "money" (the very first line), the number in the quotation marks indicates the amount of your money, change it at your discretion.

In "careerSavegame.xml" file also look for "money" and change it to the same number as in the "farms.xml" file.