In my opinion, that sounds like an awful lot of work that would just take away much of the joy of chicken keeping for me. Maybe I'm just lazy, but I find that it's worth the effort to design things for the most effortless use. If I have to fill extra feeders, or fuss to access a poorly designed enclosure, or take extra steps in my daily care of my flock, it gets annoying very quickly.
My preference in chicken flocks is a mixed bouquet. When I first ordered chicks from the hatchery I selected one of each standard-breed laying hens, and a couple of roos chosen for their classic good looks, a Brown Leghorn and an Ameracauna. I've been fortunate that they both turned out to be mannerly.
I have some bantams that do all the brooding, and over the years have raised some beautiful home-grown mixed-breeds -- mutts, if you want to call them that. Part of their appeal is trying to figure out their parentage, and seeing the unique new combinations of colors & patterns they have when they feather out. They are extra healthy with their hybrid vigor, the hens make reliable layers and the eggs come in a wider variety of colors. The roos flesh out nicely and are welcome at our table.
I know there are many folks here who raise purebreds for showing and to sell their eggs, others breeding for specific traits, and you'll want to hear from their points of view. But I think if you're just getting started you might have just as much fun plus make your chores easier keeping everyone together and not worry so much about keeping your breeds separate. If later you do decide to breed purebreds you can just separate the ones you want to breed, or limit the types of roos you have in with all the different hens.