I'm actually in the process of designing a better coop for our chickens, with the intention of including all of the above.

I do have one question, how do you keep your mass waterer and the individual nipples from freezing in the dead of winter?

We have a large shed, half of which was used for poultry by the previous owners, and I've thought of housing our chickens and rabbits together (with the rabbit hutches elevated), so that their combined warmth would keep their water from freezing, but that would mean that I'm still entering the coop to feed and gather eggs.

The dimensions are roughly 12' x 16', and I use deep litter method in the winter, so unless we add a LOT more birds (since we currently have only six chickens), there won't be any real issues with ammonia. I also add lime between layers of straw.

We did come up with a great mass feeder a few years back, not being happy with the designs and prices of those readily available, so we wound up using a roof vent cap and vent pipe turned upside down and hung inside the coop, which gives them ample room for everyone to feed at once if they so desire.

I do give them additional soaked feed every other day as well, so one day I fill their dry feeder, and the next I give them soaked feed, while giving them ample scratch grains daily.

It works great for our girls, and for the eight chickens and ducks we have currently, a single filling lasts them for two days. I'm hoping to separate them, though, as the ducks do great in their current enclosure, but it's really too wet in the rainy season for our chickens.