What kind of evidence are you looking for. If you need x amount of dollars to build a school and you dont have the money, where do you proceed from there?
You continue raising money until you reach your goal.
When a church wants renovations, they have a big thermometer sign in the church that says, we need this much money to renovate, we have this much money currently, please donate so we can renovate. You stand up in the middle of the church and say *HEY WHERE IS THE EVIDENCE THAT THIS IS MOVING FORWARD*
Everyone looks at you like you're stupid.