I have to go back and read a page or two but in asking what do you do with extra cockerels. I personally created a bachelor pen for mine.
I would love to rehome even if it meant giving them to somebody who would want them for freezer camp as I have done in the past, but unfortunately I discovered earlier this year that I have Marek's disease in my flock. That means I will not, in good conscience, let any of my birds leave my property alive and I have no desire to butcher them myself so they will spend out their lives on our farm. Since the MD has hit my roosters the hardest, I know males will trickle in and trickle out.
At the moment, I have ten young cockerels in a pen with an almost 2 year old rooster. They tussle with one another on occasions, but the OEGBs are harder on the bigger roosters then they are on one another.