Everybody seems excited about auto feeders, my pet peeve is cleaning and filling a waterer that has to be turned upside down to fill. Who has an auto-waterer? BTW, I agree with full size house doors for access to the coop areas. I enjoy my project much more since I added that feature.
We have 3 Brite Tap 2-gal Rubbermaid nipple valve waterers from chickenwaterer.com and we love them. We have one in the coop, one in the backyard, and one for the indoor hospital pen. I got tired of chicken poops, ants and bugs, wild bird droppings, and all sorts of debris floating in the chicken drinking water and got tired of refilling and cleaning bowls 2 and 3x a day. With the 2-gal nipple valve waterers the water stays cool in the insulated Rubbermaid, I can use bottled water instead of chlorinated tap water, and I can toss ice cubes into the jug on really hot days. What's nice is that I can go up to two weeks without having to clean and refill the water - it stays CLEAN and unpolluted! In the photo of our garden a couple doghouses for the chickens and the Brite Tap red jug is under the pop-up canopy where the chickens hang out most of their day. Following instructions and having Mark at chickenwaterer.com advising me we made the transition from open water bowls to all the hens learning to use the clean nipple valve waterers! I also got the Sun Covers to fit over the Brite Tap to protect and keep the water from warming up. Brite Tap is not the only nipple valve buckets available. There are other websites of other pre-made buckets but we like how this one looked in the yard and that it was insulated.
http://www.chickenwaterer.com/