We are getting close to giving away the 70 road runner

So is it standard to keep some of the money to cover operating costs and not count that as "Proceeds"? (Sorry, I'm very uneducated about this.)

There is a cost of doing business even for a non-profit. If there is a payroll then the money can be used up pretty fast. Everyone in our foundation is a volunteer and that even counts the attorney as well as the tax people.