cappy, I wish I knew about that stuff, too.
I am learning as I go. lots of u tube watching.
and google searching.
why would a coop for 25 chickens be impossible?
just build it bigger than you think you need.
one of my coops is 12ft x 16ft. two 16ft long roosts. 10 laying nests. it handled 40 hens.
You don't need than many nests. 3 or 4 will do.
I even have brooders built in above the nests.
make your feed storage near as you can to the feeders.. you will soon get weary of feeding if you have to lug feed from very far away..
I have plans for a 5 gallon feeder that I made.
they don't waste hardly any feed with it.
I cost me nothing for a 5 gallon pail, and only about $4.oo for the pan .
I also used this feeder for my puppies.
5 gallons is about 30 pounds of feed.
I suspended the roosts and nests from the wall. no legs sticking down to the floor anywhere.. makes cleaning a lot easier.
also makes catching chickens easier when it is necessary to do so..
make the people door wide enough to fit a wheelbarrow through.
I made the windows and roosts removable .
the window sills are about 2 feet above the floor, I can park my tractor bucket outside the windows and shovel the litter right into it ..
have electricity to it. at least for lights.
I can run 4 heat lamps if I need to.
........jiminwisc.......