Any alternatives to a permanent coop for a large flock?

[fisher39]

I'm planning on getting around 30 bantam chickens soon (and that number will continuously increase). I know people like doing stuff the easy way with little chicken tractors and mini houses on wheels, but I can't see those solutions working with a large flock. Most of those chicken houses can house up to 10 chickens or something.

So I'm just wondering: are there any interesting, innovative ideas on an "easy" solution on housing a lot of chickens? I can go ahead and just build a large coop for them, but am wondering if the effort is actually worth it. Any interesting ideas out there?

Oh, and they will be completely free ranged, and locked up at night (lots of predators around here).

 

[Bear Foot Farm]

If you want both "large" and "portable" build it on a trailer frame