Yep that's great! Also if you don't mind me asking.... Are you making a coop and if so I would love to see how it turns out and how much it cost. ThAnks!
The 4/10 'rule' is a basic minimum, IMO, not an absolute.....
.....there are many variables to consider when determining how much space will work well for a healthy chicken environment.
There are 2 articles linked in my signature on Space and Ventilation that are a must read for any new chickeneer.
I have great news everyone! My dad is giving me Haft the shed for the chickens which is around 60 sq ft I think. Which is more than enough space for 8 birds right!? Also I got a pullet egg last night! !!!! I'm so happy!