Mike didn't you post the link for the one made out of a laundry sink?
Locally the sink used in that Ebay auction is about $18 Canadian. $15 US? Figure out some dividers. Get some plastic pipe or copper. Cut it to length. Use T and elbows to assemble the thing into a manifold. Solder it if you want but leaks won't matter. Use your hack saw to cut slits in the bottom of the pipe. You'll need a hose fitting at the inlet side. Drill a hole in the side of the sink high enough. Likely want to fit some sort of fitting to that to. Then figure out dividers.
I bet $30 US give or take. Unlike the one on Ebay for $200 plus shipping.
It'll be a batch washer.