Prison Architect

In the upper right corner of the top information bar, which is always on screen, is a number that's either red or green, this is your cashflow. You want it to be 50,000 in green. When you go to report (press ) and select Finance you can see your daily income and outgoing cash flow. The trick is to get +$50,000 in total, when you run a big prison and you don't get it by just playing you can safe your game then stop all programs and fine most (or all) personal, that helps. It also helps for the Spare The Rod Trophy. This isn't too difficult in a 500+ prisoners game but if you need it for clean up or you don't want to take the risk within your main game, then Blaystro has a few more tips:

• Without prisoners: On a big map, build a huge Forest with enough Workmen (200+), Gardeners (50+) and an Export room big enough next to the road. Build several Staff rooms for your staff to be more efficient. This method works perfectly in any game to reach a huge cash flow with a few prisoners.
• Create a new prison. Put the intake to 0 for few days until 110+ prisoners are waiting, then you can accept all them at once and put them in a giant Holding Cell. BINGO!