Hi Fred. Welcome!
I have a family of four, too, and we now eat a LOT of eggs. Let me tell you, we love them so much, plus we're healthier, I swear. There are a lot of vitamins and protein in eggs, and my doctor just told me that there really isn't a cholesterol problem with eggs, that was all a myth. Yay! I eat about two a day.
We have 13 hens and a rooster. You can see my breeds below -- all brown eggs. I chose them as good winter layers because our winters are long here. We now get between 9 and 12 eggs a day and have enough to give away, plus we put out an egg stand once every week or two.
The best and most consistent layers are the Rhode Island Reds, the Jersey Giants, and the Delawares. Apparently leghorns give good white eggs, but I think plain white chickens look boring. Everyone likes our brown eggs, too.
I just ordered six more chicks for this spring, because I couldn't help myself, and I know we can sell all the eggs.
I was going to do meat chickens, too, but my kids talked me out of it. I would do it totally separate from the egg layers, because the egg layers are too much like pets.
This is what I'd do: Order 25 meat chickens in spring and keep them in a tractor or a movable pen so that they have access to clean grass every day. They grow fast and poop a lot and I think they'd make an awful lot of mess in a coop. You can look up "pastured poultry" and see what I mean. Then you have them butchered about 6-8 weeks later.
-- Oh, about coop size: you need four square feet per chicken in a henhouse and another ten square feet in a run. HOWEVER! I noticed that my chickens rarely use the full run space. Most of the year they free range, and in the winter they like to snuggle up in the henhouse. So I think it would be okay to skimp a little on the size of the run. I wouldn't skimp on the size of the henhouse, though.