Game cheating is the way to go when you need to excel in a game

PC Building Simulator – Money Cheat

This adds 100 million to the current player’s cash until it reaches the maximum possible signed 32 bit integer value.

This was made for v0.7.5, and it will not work when the game updates afaik, it’s a very simple Unity cheat.

Download then copy the file into PCBS_Data/Managed
Remember to make a backup.