It also depends on how many cars you plan on doing in a day, if you plan on hitting 10 cars in a day, you're going to want at least a 100 gallon tank, and I'm telling you right now, the ranger isn't going to cut it. When your tail end is dragging on the road with sparks flying everywhere and water tank smashing into all your equipment you might as well kiss your truck goodbye. But on the other hand, if you plan on using your clients water, power, then yes, you may take the gas saving ranger and succeed in saving gas. There is no simple explanation on what your best option is, I went out and bought a 1000 dollar van and I'll tell you what, I'm spending all most twice as much on upgrades, not because I want to, but because I have to. My water tank isn't even a 100 gallon tank and it was popping tires left and right, and I'll tell you what, that just makes me look bad, when my customers pass me on the side of the road and see my van all broken up from poor equipment, oh man, you do not want to go there...