Are you selectively breeding more than one variety/color/pairing? What do you plan to do with the chicks, what are you breeding for, do you plan to sell and to whom, etc.
The first advice I'll give is of course, you should have at least 3 hens per rooster. And even 3 is low, the rooster will wear them out in no time. However it should be no more than 10, and 10 can push it if you're breeding to sell hatching eggs, as the more hens per rooster, the lesser the fertility rate. Roosters can be choosy, and some can have fertility that doesn't last as long in the hen.
I want to start with breeding my cohin with the goal being a gold cuckoo....or whatever shows up that looks cool.
I have a barred cochin roo, two buff and a black cochin hens. Right now my coop is really old fashion, (it was my great grandmother that we moved) but I am starting construction on a new coop as soon as the weather clears up. I do have a large fenced in area that I use as an additional run sometimes.
Other than that I have a nice looking EE roo with a badger hackle pattern and a strange chest feather pattern I want to encourage. I have no idea what to breed him to that would help that pattern
As for what am I going to do with the chicks, I plan on keeping them
I will probably eat the cockerels or sell them to the local 4-H chicken project for handling/showing experience. If I end up getting too many chickens for my coop, well I guess I will get to make an additional coop!!!!