That'll be good for quarantine, if it's far enough away...We also have a fairly large outbuilding on the property where we can brood/quarantine, etc if needed but this will give us some flexibility. I need to pick up a few more dog crates-we have a couple like you pictured but we could always use a few more.
...but I like to brood right in the coop, makes integration of new chicks so much easier!
I have 4 crates and almost wish I had a couple more but not enough to shop for them, got most mine at yard sales/flea markets for less tan $20 each.