I've had modest success with my pressure pot. I seem to be able to blast for 10 minutes and then I need to let my small compressor catch up. It clogs now and then. I found it clogs less if I don't open the media valve all the way. Maybe just half way. I keep a pick tool in my pocket and jam it into the nozzle when it clogs and that works half of the time. I so make sure to stop all air flow before I release the dead man on the working end. That prevents pressure from building in the hose which can complicate things by compacting the media.
I also have a cheaper table top cabinet. It's a one piece molded plastic version with a lift lid on the top. Not big enough but it will do small stuff.