If I had to make a living in the chicken business I'd not want to do it. I sell my extra eggs and sometimes do not have enough for myself. The idea of me having chickens in the first place was so we'd have our own eggs and once in a while maybe some meat. Now I'm faced with needing some more chickens just so I can eat some eggs once in a while and fill all the orders for eggs. I guarantee you having enough chickens to make a living off will be work, a lot of work and not a lot of profit to be made. I just sell my extra eggs cheap, I'm not even sure if it's a break even thing and I don't even care, so long as the eggs don't go to waste. Back when I first got chickens, I was selling to a lady that was hoarding eggs, why, I don't know. One day she stopped in and told us she wasn't going to be buying eggs anymore because she had quit her catering business. She said she threw away like 15 dozen eggs, Made me sick. I could have been selling eggs to people who only wanted a dozen or two a week and had regular customers to buy all my surplus eggs, She came back this winter and wanted four dozen, I saved them up for her, but had other regular people I could depend on for buying I had to tell I didn't have the eggs. After she came to pick up the eggs, I told her I just didn't have enough eggs to supply her and those folks that had been buying already.
Good luck trying to make a go at chickens, it is far more work than it appears, but it is an honest living, if you can do it. You will have far more hours spent with your chickens than if you held a regular job and just went home at night and let the boss worry about the profit margin. I'm home most of the time, so I can look in my chickens when ever I get the urge. But, no matter where I go, I always am wondering if my chickens are okay, did I make sure they had enough water, are predators lurking, will I be home in time to shut them in at night, etc., etc. I only have 15 birds and one pig to worry about, but for me it is just a hobby, if I was in it to make a living, I'd have 50 times the worries.