
I am not saying the can of worms won't work, because I know it does. BTW, cut a piece of landscape fabric to put in the bottom tier. This helps keep worms out of the collection tray.
But do you really want (need) to spend so much for a house for compost worms?
You don't! You can make one yourself for <$15 [...]
Use the savings to buy an extra pound of worms and a BUNCH of veggies for you.
You will still be ahead.
Get more detail about Can-O-Worms.