Maybe I've partially answered my own question - I just discovered that Eastwood sells a combination soda/abrasive media blaster for $279, and it appears that some Sears stores are also carryin it. To swap over from one type to the other, one has to change the valve, hose, and assorted hardware, perhaps due to the differences in general size of the media.
I'm planning to try to do some of my own painting on my bike, truck, and possibly another bike if I buy one this year. This would include blasting and painting the R65LS wheels, tank and bodywork. I'd also like to be able to blast the rust off and repaint my tractor implements: rake, grader blade, woodchipper, loader and to remove rust I'd have to use something other than pure soda. I'd also like to be able to soda blast things like the R65 fork lowers, carbs, etc to just make them clean, etc. But as I mentioned, I don't have much experience in this area. I do know that I'll have to get appropriate protective equipment, respirator, hood, use hearing protection, etc.