See how you get on with ten laying hens and scale up?
Sorry if that sounds patronising but that’s what I would (and have) advise. Feed costs are going to be rising, could be prohibitive. I keep costs down by feeding garden and veg waste, letting them graze. Grass clippings, wood chip and cardboard become invertebrate rich chicken food after a few weeks. I typically have 10-20 birds, I couldn’t do what I do with 50 and so would have to rely on bought food - which I think would leave a tiny margin and make it too high risk/not worthwhile.
Please prove us all wrong and tell us how you get on with your happy healthy profitable organic egg venture, I wish you every success.