Is there a standard Sq ft per chicken as far as pens ,tractors or houses go? Thought about starting with a tractor,or adding to the garage for a pen. Just me and the wife,but may sell some too! Also though about maybe raising some for meat. So any suggestions will help. Would I be better getting a certain breed to eat and lay eggs? Building is the easy part! Need some sex education and chicken relationship lessons I guess. LOL! May be a couple roosters an 4-5 hens to start?