I am about to build my third coop, it will be made completely out of pallets. I was thinking 3/4' and it will hold four birds, but would like to be able to put maybe two more in there when I have extras. Would this be big enough? Does the coops NEED a window if it has proper ventilation? Any ideas on interior ideas? Also, The run is going to be made of pallets as well, the birds will be able to free range for a couple of hours a day, how large will the run need to be? Thanks!