Spending far too much time on this game
Actually it's much easier to make money than SC4 so there's no real need to use the unlimited cash cheat.
The challenge is maintaining enough "uneducated" workers to maintain your base manufacturing and agricultural industries if you have them which means doing a bit of crafty social engineering. The biggest annoyance with the game though is having to constantly manage your landfills. Hopefully there will be a mod or patch to do this automatically for you on building incinerators.