You might not have enough space for 6, standard/large breeds. They should have a minimum of 4 sq. ft. of coop and 10 sq. ft. of run, per bird. Bantams use a little less. Ventilation is the most important thing. You can keep an upper soffit completely open, covered in hardware cloth, and a few windows, or vents, to make a cross breeze in the summer months. My coop doesn't have an open soffit, so I have a small, outdoor, fan in an upper vent, that pulls air out constantly. Just make sure the ventilation that's at roost level, or below, can be closed in the winter months, while leaving the upper ventilation open. I keep my fan on low in the winter, to pull out moist breath and ammonia. Winter ventilation is just as important as summer. I would place the nest boxes low and on the north side of the coop. That way, hopefully, the coop blocks some of the summer sun. Other than ventilation, use hardware cloth, instead of chicken wire, for the run. Predators can rip through stanard chicken wire. If your run is going to be covered, I used the corrugated, white, plastic panels from Home Depot. They provide shade and the white color helps reflect the summer heat. The coop designs page has some great designs and ideas that others have used. When breeds are chosen, you might have to tweak things to suit them. I have Buff Opringtons, so I don't care about the cold, they can handle Virginia winters. I did, however, need lots of open vents, shade, and an extra fan, in the summer. Good luck and have fun. Owning chickens is a blast, and a bit addictive.
