I went by temp as opposed to age for letting them out. After dressing them out my best was 6lbs and smallest was 4lbs
I bought the shrink bags and did 2 that way, those work great, then we decided to fire up all the roasters and oven and can them.
We also made broth from the bones and canned all that for chicken soup this winter.
I also kept them on food all day long. I refused to do the chicken math , lol , so I can’t tell you how I came out money wise as opposed to buying at the store, but the goal was good quality meat to store.