I have enough extra basement storage space in our Winnebago Vista I bought a 110 volt AC "pancake" compressor rated at 150 lbs. Harbor freight, Walmart, Home Depot, Lowes and more sell them for about $100. I have to fire up the generator but I can top off a tire in about 30 seconds with it. If you have a genny and the room, sure is a lot more bang for the buck. In my case, I was able to screw it down and get a long enough hose I could reach all the tires. Got tired of dragging it out and using an extension cord.