I have a cabinet I built using parts from TP Tools I used their pickup tube, gun and gloves. I can put a rearend, harley frame, or engine block in it. The performance is incredible! It out blasts my friends Harbor freight unit my a mile, and I don't have much more money in mine. It would have cost quite a bit if I charged myself for labor.
If you want to buy one that is complete, check out TP Tools, Their skat blast cabinets are great and they start around $200