I think you get better roosters if they are raised in multi-generational flocks. This is why people that have had flocks for years seldom have trouble with multiple roosters, whereas roosters raised by beginners with just flock-mates, or birds born in the same year have considerable more trouble with roosters. People with established flocks, tend to have more room, have more experience with chickens, and a better concept of what works in their own coop/run/range setup.
Your idea might work, and it might not. Roosters are bit of a crapshoot, some fight, some don't. You can influence by space (which you do have, so that is a plus) but only to some extent. If you are keeping multiple roosters, I find a father/ son with the son raised up in the flock tend to work better over the long term...if you have a lot of space, and the stars line up and you are lucky.
Often times, beginning chicken people think that by raising birds together, they will form friendships that will outweigh hormones. That really does not work with chickens. And they think that if the roosters each have enough birds, they will be happy and not fight. That is also not true. Roosters do not understand sharing hens or these are your hens, these are mine. Each rooster will want ALL the hens. Now given enough space, he can really only defend so much area, so many hens.
Two roosters raised together, somewhat like brothers, often will get along until they don't. They may fight once, settle it and be done. They may fight once, wait, fight again, wait, fight. Or they may fight until they are bloody, and one or both could even fight till death. Most people underestimate the violence a rooster is capable of fighting with or attacking people.
If you have small children, I would not recommend keeping a rooster. Roosters take experience IMO. Cockerels tend to attach children first, and being shorter, can take that in the face, then women, then men.
Not all roosters work, regardless of how you keep them, they are rather a crapshoot, with some working incredibly well and pleasure to have in the flock, and others become a nightmare that can ruin the whole hobby. If you keep roosters, you need a plan B, that is set up and ready to go, where you can separate or confine a cockerel immediately.
Cockerel behavior at 10 weeks of age is no guarantee of future behavior.
Good luck, but know going into this, it might not work through no fault of your own.
Mrs K