If you put hwc underneath the chickens cant scratch and might hurt their feet at some point?I'm hoping to put 1/2 inch hardware cloth underneath as well to prevent weasels and stuff getting in.
You need slabs all around to prevent predators from dogging underneath.
This setup is probably large enough to move weekly. Invest in the slab and lay stones some on top. Rather than moving daily.
Chickens don’t need a cage as long as the weather is fine. They need cover for the hot sun and storms. And a roost to rest/sleep on and feel safe.