I save a small amount of money by having a 120 gallons of fuel in my pick up and filling up where fuel is cheap. but being able to pick and choose stations with easy access and places where it is less crowded is priceless. My range is about 1,700 miles which leaves me many options of where and when to fuel up. You will not save enough money to cover the cost of the pump and tank but I highly recommend it. I didn't have to drill any holes nor did I have to rewire anything. All I do is clip on to the battery when I pump fuel from the AUX tank to the main tank