If you take a close look at how people are making money with chickens a few things stand out. Large chicken farms keep a lot of birds in a given space at least 10 times as many as is recommended for BYC. This REQUIRES that the birds be debeaked so they don’t kill each other.
Second large sums of borrowed money are used to build automated barns that reduce labour costs to a minimum. These two factors are the reason why a small chicken keeper simply cannot compete.
There are people making money on pastured poultry right now with hundreds of birds. They use low cost movable structures and reduce feed consumption by utilizing grazing. This also reduces behaviour problems by keeping the birds busy. Profits require that there is a market for premium priced, locally grown, naturally fed eggs or meat.