[elhigh]

I found a perfectly serviceable air comp at Big Lots (maybe Odd Lots where you are, or none at all) for about $80 a couple of years ago. Oil lube model even, so it'll last longer. Mmm, serviceability. Love that.

Anyhoo, keep your eyes peeled. For the convenience, I'd say get the compressor, and not the el cheapo cigarette lighter model. I built a little cabinet that mine lives in so it doesn't walk around when running (very likely, no matter how well yours is engineered) and added some shrouding to keep the noise down. Plumb in some sturdy flex line and add tees where you want them, and you can run pressure lines all over your shop and just have a shorty hose to plug in anywhere it's convenient, plus a plugin on the outside wall for when you have to top up the tires.