I think you could easily fit 6 hens in that coop, if you add another 2 by 4 for another short section of roost particularly, and like someone else said, you don't need that many nesting boxes. I think I read one nesting box per 3 hens is good. I have 4 nest boxes for 10 hens in the coop, plus another nest box outside the coop. I have a 6 by 4 ft coop and it's used for 10 hens, and they seem fine with it. THey only sleep in there and go in to lay eggs, they don't hang out there during the day, and I live in California where the weather is mild so they don't reallly need the protection in rain. Their run has a part that is covered so they can be outdoors when it's raining. If you have that type of setup you can get by with a smaller coop, I'd say.