May I ask, is that a prefab coop or did you have it made?
I was going to ask if you made it or it was prefab, i have building plans for almost identical...it said "easy", but when you dont even own a saw...its not easy. I love it and think it is perfect for your 4 girls as they grow. Youll be suprised how big they get when those feathers come in. Im in PA also, with coops this size the placement of vents is tricky as you dont want drafts where they roost/sleep. If you're the type to stay on top of the litter and clean it often so its not wet/damp dirty 4 hens should not need much more. Some people do deep bedding, others prefer to clear it out weekly/ monthly. With my 3 ive found they dont soend a lot of time IN the coop. Mainly just to sleep. So i can get by changing liter monthly cleaning/poopscoop every few days. I THINK THEY'LL LOVE THEIR PRETTY NEW HOME!