A long time ago, Providian Bank commissioned a similar study for the routes of their armored vehicles, to save gasoline. What they found is that the cost of the gas was relatively insignificant compared to the cost of the interest that they were losing by not having the big mass of money deposited ASAP. The insightful analyst became President of the company.
I imagine the same is true for your dilemma. You could spend days, maybe weeks, of high cost CEO and other high level talent calculating the most efficient route, thereby wasting your valueable time (opportunity cost) to do other profitable business. All you gain is maximum efficiency for your $7 an hour driver.
