Ok, lots of replies and questions, thank you! I wasn't expecting such a quick and full response!
Several of you had similar questions about the setup, so I will try to answer those below:
1. What is a "Food Forest"? Also known as "agroforestry," a food forest is permaculture modeled after the complimentary plant systems we see in forests. The different levels of canopy height and root deepness allows complimentary plants to grow side by side without competing for sunlight, nutrients, etc. There are several successful ones up and running in my area (Provo UT), which is how I learned about them.
My end goal is to set one up in a publicly accessible place (think like a park) with a modest admittance fee so families can go in, enjoy nature, learn about how it works, and gather food for themselves. I would love to help inspire families and local government to try it for themselves.
The problem is land is always expensive in the city proper, so we will start with cheap land in the country near us. That way we can get the hang of food forestry, provide food for our family, and build up resources to eventually propagate a future city location with.
If you want to learn more about food forestry, here are some links:
https://www.permaculturenews.org/2011/10/21/why-food-forests/
https://www.atlasobscura.com/articles/what-is-permaculture-food-forests
https://www.permaculturenews.org/20...ction-three-years-update-wadi-rum-consultancy/
2. Where's the project location? We are looking for land near our home in Provo, Utah. The plots I am looking at are either in the foothills/mountains to the east or the flat farm/pasture/undeveloped land to the west of Provo
3. What are the chickens for? I have always loved chickens and wished I could keep a bigger flock with roos, so the country plot would be the perfect opportunity to do that. I can try new breeds, fertilize the soil, and use the proceeds of selling eggs/chicks/chicken meat towards buying some of the more expensive trees and plants we'd like to propagate.
4. Which Breeds will I use? To be honest, I'm still in the process of deciding that. I mentioned in the initial post that I'd like to raise Cream Legbars, Bielefelders -- those I would sell to backyard flocks to make autosexing chickens more well known/accessible in my locale. The American Bresse would be for selling eggs and meat.
I've raised and kept several types of chickens -- Rhode Island Reds, Barred Plymouth Rocks, Leghorns, Australorps, and Red Sex Links, to name a few. While I adore certain of the sexlinks and would love to breed a flock of them, I learned about European autosexing chickens that can be sexed at birth AND continue to do so generation after generation.
These breeds are popular in the UK but are not yet well known in the USA. This seems a shame to me as I know many backyard chicken keepers who like to hatch their own chicks, but are not allowed to keep the roosters. Everything's fine and dandy until 5 months in, your favorite pullet starts crowing, the neighbors complain, and the city tells you to get rid of your rooster ASAP (don't ask me how I know about that). Once you're bonded to a chicken, it's really hard to let them go to some random person to be turned to soup! It would be soooo much easier to know from the getgo which chicks are hens and which are cockerels so you can plan accordingly. SO, that got me thinking that maybe I could breed and sell autosexing chickens on the food forest land to make the breeds more popular/available in my area while they fertilize my soil.
I've been keeping tabs on what kinds of chickens people are selling/buying locally, and I think Cream Legbars would be a good fit for people who like Easter Eggers, and Bielefelders would be a good fit for people who like RIRs and BPRs.
Next spring I will get 3 Cream Legbars to see how I like them and gauge local interest in them. Once our current Lohmann Browns die (they tend to have a shorter life span than heritage breeds), we'll get some Bielefelders and do the same thing.
Where do the American Bresse come in? I know if I start breeding and selling fertilized eggs, chicks, and chickens, people will inevitably want more females than males... so I want to set up humane bachelor pens for the autosexed roos to grow up in until they can be sold as meat. :/
If I can give them a humane life and can tolerate raising them for slaughter, then I would give raising American Bresse a try. Besides being productive layers of large cream colored eggs, their meat is world-renowned for its high quality marbling. They would be a good breed for producing consistent revenue (eggs in the warm months, meat in the cold). I already have three potential outlets for selling their eggs and meat, so we'll see how that pans out.
5. How will I keep the chickens? This is a question a lot of you had. My experience with chickens is letting them free range in a yard or pen with access to a coop, water, and additional feed. And having a dog to keep predators at bay. So that is the model I was thinking of following: fencing each breed into their own block of foraging area with their own coop, water, and additional feed.
But I liked the idea some of you mentioned in your responses of doing chicken tractors -- I think that would work well for separating the flocks so they can enjoy aspects of free ranging without mingling with the other breeds, and I would have more control over collecting chicks, eggs, etc, than the former setup. So, that was a great suggestion there, thank you!
If you have any more thoughts based on all that, let me know!

I will also go back through the replies and see if there were any other questions I missed.
Thank you so much for all your input, guys! ^_^