My coop is 70yds from the back door. This was by choice, as I built off an existing out building. I have 45 hens and 4 roosters at the moment, and the roosters can get a bit annoying. Being 70yds away (before they are let out at 4:30 am) they noise it not bad. As for smell, I have a 600sqft full enclosed run they only gets used during inclement weather, or when predator load is high. The coop get the deep litter treatment, and cleaned out 2x a year. I have a poop board with sand and sweet PDZ which has been wonderful for keeping the smell/ammonia down. It gets cleaned out (usually) on my Saturday.
