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Have you seen the pressure washer sandblaster kits for like $30? Bought one, haven't tried it yet. I bought it with the intent to do trailers and such, basically anything that was too big for a cabinet. Mixed reviews from what I can tell so???
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I agree with Z28Doug, you're gonna (I know, bad English ) need air, and a lot of it.
I use two compressors generating about 35 CFM total, and they run constantly while I'm blasting. Small dimension/cross section stuff like wrought Iron is a bit difficult to blast simply because of it's narrow size. What they call "silica sand" at home centers is the most abrasive/cheapest stuff you can use, and you can recycle it two or maybe 3 times before it becomes too fine to have much cleaning ability. However, as others have said, a good respirator is a must.
