Yeah, that's an option that I'm kicking around. I would rather own the tank, however, as I have a tendency to break things.

So far, about the best price that I've seen is $68 for a brand new 10 pound tank on ebay. Beveragefactory.com says that they'll match prices. I wouldn't mind buying a used tank, I just haven't been able to find any decent prices on a 10 or 15 pound tank. Praxair sells used cylinders for about $30 more than I can get a brand new one for. I've also tryed a bunch of local scrap yards with no luck. There's got to be zillions of these things out there, I just haven't been able to locate a good source for one.

As far as regulators go, offroadtuff.com and williamsballoons.com have some that look pretty decent for about $35. Air chucks and hoses can be found just about anywhere, but the Comp Flex or Flexcoil hoses seem to be the thing to use (no experience with either).