I read somewhere that about 3-4 hens per box was a good rule of thumb. But I don't remember, it may have said at least one box for 3-4 hens.
I now have 3 temporary nesting boxes. 4hens lay out in the back 40 - 3 in one spot, 1 in her own private little place (she is my broody girl). 2 of them in 1 box, and 4 in the farthest corner right beside a nest box. 2 of them are not particular and I find their eggs anywhere there is a sprig of hay. Thankfully, lately that has been in the coop. two nesting boxes are never used.
I do have to say that I don't have great boxes right now. Just basically apple boxes for 2 of them, and a large heavy ottoman type stool upside down for the other. Mostly they use them as roost, so that may be why they aren't using them for boxes.... They are always full of poop in the morning. Maybe if I get my act together and get them proper boxes they would use the..... We will see. I think Francie will still go out and hide in her favorite spot until I put her back in the ranging area each day. Well, until I get netting over the entire chicken yard anyway.
RonB - This explains so very much. A middle child, Huh! It is a very selective club full of needy funny and spontaneous attention seekers. But boy we are sure a lot of fun when you get us all wound up.
Now, I can hardly wait to meet your wife. She must really be something wonderful!