No help for you.
As with all Sim games involving humans, happiness makes money. Believe it or not, you have to have happy inmates for great success. That keeps the money flowing, and more prisoners will come.
To prevent rioting and negative activity, you have to keep your prisoners happy. Exercise, food and basic comforts have to be balanced, or you will encounter dangerous outbursts.
The way your prison is run reflects on how it matures and prospers. That’s a given, but since this is an unusual genre for a Sim game, there are interesting factors like food and entertainment to keep people from killing each other. Success creates reformed members of society and there is the potential to have such hardcore prisoners that a Maximum Security area be created for death row prisnoers.