This is what I did about 10 years ago.....
Build-Your-Own Cabinet - Trigger-Operated System - TP Tools & Equipment
Bought the basic $99.00 kit, back then,probably about 50 bucks......One and a half sheets of plywood,built my own cabinet,it's 4 feet wide X 2 feet deep X about 30 inches tall..took me an afternoon to build it with help from a buddy....I probably spent no more than 100 bucks all total, but I did have the blower and some other items around the shop before hand......I made the front section where the lense is,hinged,so I load from the front, I use plexiglass for the lense,works fine.....I have two regular 60 watt light bulbs inside and a small squirrel cage blower mount on the outside to draw the air/dust out,all wired in to one 120volt switch........works like a charm,very inexpensive.....
Also,depending on what your blasting, I use regular sandblasting sand, I find beads do not cut enough when things are rusty and way too slow...
I used their basic plans, just made the cabinet larger for my use....Once you have one, you'll wish it was bigger, and you'll use it all the time....I'd bet I use mine on average once a week, it's just too easy to go in the shop, turn on the air compressor, flip a switch and be blasting/cleaning up anything in less than 5 minutes......
David