I bought a 18 gallon Sterilite tub from Walmart for $8. Just a standard black tub that was on sale and I cut out the top and layed down aluminum screen mesh on the top for ventilation. Picked up aluminum screening at home depot for $5 for a roll. Then used a hot glue gun with a glue that bonds plastic and metal well. Here's the result... Cheap setup and works really well.

Outside of the bin:

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Inside shot with food dishes and egg crates; I house about 250-500 adults in here at a time for a week:
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Clear packing tape along the side walls so the crickets can't escape, they can climb the rough walls of the inside (No escapes and I have this bin in my room):
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