I was afraid of that response. I've got a teeny HF sand blaster and 20 gallon compressor. I don't really have room for too much more, unless my wife / code enforcement will let me park a blast cabinet outside. Even using the cute little sand blaster is fairly impractical in the area I have to work.
This is what I have.
https://www.harborfreight.com/18-oz-portable-abrasive-blaster-gun-kit-59490.html
When you say siphon-fed, do you mean something like this?
https://www.harborfreight.com/air-tools-compressors/air-tools/blasting-cleaning/50-lb-portable-abrasive-blaster-kit-59483.html