There are a lot of gas stations in the USA. I'm sure there is one gas station out there that will not notice if an extra gas pump "shows up." So, to make money find an old gas pump. They are pretty easy to find. They can be found in random fields with rusted metal and old farm equipment. Bring the old pump to a gas station and put it next to all of the other pumps. No one will notice the rust if you put a "passed inspection" sticker on the pump. Connect your pump to the gas stations system. Make sure you use their gas system, but not their money system. Make sure you keep your credit card machine separate from the gas stations. People will fill up the gas stations gas with your pump and pay you.