I've thought of doing this as well. We have four hens for eggs and are allowed eight chickens all together. As someone else said, since they'd be indoors for the first few weeks, we could start a batch inside, move them out a month later, and get four more chicks then, a month later process the first batch and move the second outside. I went to a butchering session a month or so ago and yes, it was a lot of work for what you get, and not cheap to raise the chickens, but we eat chicken several times a week, and I would so rather it was a bird I had grown myself. My concern lies in how to keep two flocks separate and healthy in close proximity to each other - the hens free-range when we're home during the day. There a lot of predators in my neighborhood, so housing security is a concern. I'm not up for building a second coop yet, but a tractor wouldn't be secure enough. Til I'm over the hump it'll stay a dream of mine, but I'm glad to hear someone else is on this track too.