I would rephrase your statement to "you can't make progress if you can't hatch any. My first year's stock laid in the weeds, roosted at the top of a 2 story barn, and were only seen after dark, with a flashlight. My second year I had almost 100% fertility, but only 15% of the eggs developed into healthy, vigorous chicks. The second year I had 0% fertility, and I moved on to BLRWs.
My husband made 3 chicken tractors that I love, last summer. He is now relatively quick and efficient with that design, and my fallback gift request is "more chicken tractors, please!' Each is 8'x10' and can grow out a dozen chicks or house a trio/quad of adults. I am also improving my efficiency with early culling/butchering. All of the equipment and skills I am acquiring should be easily transferred to any other chicken breed. I am keeping in touch with the Dorking grapevine so I might have better luck with my next attempt to source breeding stock.
Angela
An advantage to a design that you like is in repeating it. I like a variety of pens and styles for different reasons. I wish that I could have predicted my health would have went the way that it did. I would have emphasized a different approach. I am not certain how to evolve from here. I doubt that I would have a single fixed enclosure. I have a balance of small tractor types, large walk ins, large fixed enclosures, rows of singles, fencing, and cross fencing. It is organized.
What I do not regret is the smaller tractor type pens. No clean outs, and they are always on fresh greens.