If you go the Harbor Freight route, be sure to check out the guy on YouTube that has a video to improve the Harbor Freight box blaster. He gets it dialed in pretty well.

We all cant buy high end tools. The HF might work well for a lot of people. 30 years ago my dad and I made a cabinet blaster out of plywood and 2-by's. Lined the interior with sheet metal, bought a foot pedal, gloves, blast gun and its worked well for home resto use throughout that time.