No, the money is paying for the cost of operating excavators. This is not a charity, the CAH team is not going out with shovels, the men driving the excavators

No, the money is paying for the cost of operating excavators. This is not a charity, the CAH team is not going out with shovels, the men driving the excavators are not volunteers. You're paying them to dig a hole. When CAH runs out of money for hourly expenses of hole-digging, the digging stops. That's it. You pay for N seconds of digging. That's the whole thing.