Boone Farm
Songster
I was thinking maybe one across the 6ft and one across the 3ft.
How tall will the coop be? Most of the birds will try and get to the higher roost if there is one so I would suggest having the higher one be the 6' if you are planning on having multi levels. I think 6 chickens would be perfect for a coop like that. That will also feed your family eggs for days.