I have a family of five=  two adults, one kid has an adult size stomach, the other two still eat off the kids menu when we go out to eat.  
One CX processed at 8-9 weeks that I raised myself (on 18-20% protein free access to feed while it was daylight) after processing is 2-3 meals for the family.  I skin mine for ease of processing, and part it out before I freeze it.  I cook the legs, thighs, and wings of one bird together after slathering with bbq sauce, and I cook the breasts and tenders together after slathering with bbq or italian dressing.  If we're hungry almost all the legs/wings will be gone for dinner, with enough for lunch for me and possibly husband the next day.  When I cook the breasts/tenders, it's the same, most of it is gone during dinner, me and dad may get some lunch, and I might get breakfast for myself the next day if the kids weren't super hungry - the breasts are super large.  
In both cases, I usually get at least lunch for me the next day, but no guarantees after that.
I discard the very tips of the wings, the tail, and the head, and all of the innards people don't usually eat.  All of those plus feathers, skin (if you don't eat it) and blood make great garden ammendment if you research how to compost it appropriately.
The carcass, neck, and feet can be used for soup stock, bone broth, egg drop soup, raw fed to appropriate breed dogs, etc.  Sometimes we get eggs from the insides of the laying hens, you just remove the eggs from the rest of the innards and boil them - they just have no whites - eat as normal.  It's only a small handful, but enough for breakfast for one or maybe two people, or a treat for the dog.  You can also save out the gizzard, properly cleaned and peeled, the heart, and the liver for human consumption.  Some countries eat the lungs, but I don't.  I mainly feed the gizzard, heart, etc. to my dog after boiling it, for dog treats.  It can also make great dehydrated dog training treats.  Very nutritious, but I never acquired a taste for organ meat.  Still, I don't want to waste anything if I can avoid it.