You might want to check with some of those local people. Since they are already doing things that work well, they are probably a great source of ideas for what can work well and what will cause problems.
The ratio of 1 rooster to 10 hens is not relevant here.
That ratio is correct for commercial breeders with hundreds and thousands of hens & roosters. Roosters eat feed but do not lay eggs, so those breeders want to keep the fewest possible roosters while still having all the eggs be fertile. 1...