Ok, so I still can't make a permanent coop since I will be renting, but a 4Wx8Lx4H is not going to do. (was thinking about making something like this: https://www.backyardchickens.com/web/viewblog.php?id=39717-how-to-build-a-brood-pen ). Now on my new plan, plan # 3000 lol, I was thinking the same 4Wx8L but the coop would be 3 feet tall and 1.5 foot off the ground. Now, my questions are: 1- Would chickens use the 1'5" under the 3 wall coop? (specially if I fill it with sand) 2- Is 2 feet "head room" from the roost sufficient head room? 3- How about 1'5" of head room from the roost? 4 - Thinking about making the nestboxes with outside access, but not in the 3 wall "coop"...I was thinking about either under the coop or at the end of the "run". Would this work? If I'm able to do this it would some more room for maybe 1 more chicken ... Thanks in advance!!!