I went through about 1700 pounds of sand. Around 34 bags. And it only took me a total of about 6 hours maybe to blast the whole truck. I've been there with the DA sander, and hand sanding and things and I know what you mean! It just wears you out, takes days and days especially if you work full time, and in the end you still aren't that pleased with the end result. My sandblaster setup is one o the best things I've ever invested my money in! I got my 210cfm trailer mounted diesel powered compressor at an auction, and drove 700 miles to get my Schmidt sandblaster from a guy on Craigslist. It is so nice to be able to blast all the rust away so quickly and cleanly, and end up with such a nice smooth surface to paint!