That's on my list too!
I've never done flood & drain.
I normally buy cheaper trays that aren't made for F&D, but recently bought a few off craigslist that should be perfect -- for $20 each
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Check ebay for free coffee tables.
Old pallets also work fine, just add legs made with 2X4 scraps.
Invest $8 in wheels ($2 each @ harbor freight), and you're all set!
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If you want a table that holds a res under the tray, harbor freight has cheap shop carts that might work.