One of the ways I raise my worms is in 100 gallon stock tanks. My preference is to start with cinder blocks and a pallet on top of that. This elevates and makes for less bending over when feeding or harvesting. The lid doesn’t have to be elaborate and can be a piece of plywood laid over the top of your bin. For a lid like the one pictured, you will want to use the metal instead of the plastic version. The reason- heat is trapped by the plastic and raises the temps in the hotter months. The metal does a far better job of reflecting the heat. There are lots of ways to skin this cat and I encourage you to put you own spin on it. Look for things you have access to already and use what you already have laying around. You’ll be surprised what you can turn into a worm bed.
Stock Tank Worm Bed
Texas Jumpers 