Use a text editor such as notepad to edit the following files in the "c:\program files\cat daddy games\school tycoon\data\buildings" folder: "restrooms.ini", "academic.ini", "administration.ini", "athletic.ini", "entertainment.ini", and "food.ini". For example, in the "restroom ini" file, look for the "Cost=" and "OperatingCost=" entries. Change these to "Cost=0" and "OperatingCost=0". The items are now free. You must do this to all objects in there.