Hey Lou,
I'm in the same boat right now. I was looking at the eastwood soda blaster but the shipping was a deal breaker ($100) I ended up with a Harbor Freight 100lb blaster, it was $129. It can be converted to soda or whatever. I still need to find a compressor but the only ones that I've heard that can keep up are $450 on up. I have a little compressor that I used to try it out and it's pretty cool how it takes the rust & paint right off. I was using glass beads from harbor freight ($$) not a smart trial media

Next up is some cheap sand. I bought a good respirator so I don't keel over dead from the silica. I'll be happy if I can get the interior blasted, the outside I'm thinking would take me forever and I'd end up warping everything. Good luck.
Chet