I made my first blast cabinet out of a large (like 50 gal) Rubbermaid trashcan with a snap on lid. Put some weatherstripping around the edge at the top. The plastic cuts easily, I made armholes with old sweater sleeves to knock the bigger stuff down, and cut a hole in the lid for a clear plastic screen to see thru, and I added a light bulb eventually with a 2 liter pop bottle for a cover. It worked okay, and was disposable. It could (barely) hold a 15" wheel, which was why I made it. IIRC, I had like $25 in it.
I eventually got a larger HF cabinet, and for larger stuff I spread a tarp outside and blast out of a bucket with a siphon gun and a fresh air mask and blasting hood from Northern Tool. You don't want to be breathing the silicon particles into your lungs, bad stuff!