I have been doing this quite some time and have yet to earn a profit. Everything we make goes back into the requirements of my flocks. I keep meticulous records for everything I buy for them. If you add up housing, flight pens, bedding, feed, treats, supplements, feeders, waterers, heat lamps, electricity, water heaters, wire, fencing, lime, reseeding, fuel for tractors, etc. Then if you hatch, you get into incubators, thermometers, water filters, wicks, brooders. Everything cost. I have yet to find a way to make money and that's not really my goal, but I track it to monitor where the money goes.
I think a lot of folks only consider what they spend in feed and think they're making money, but you have to consider everything you put into those birds to truly identify if a profit is there. My electric bill alone has been double for the last 6 months with all the brooders going, just as an example. I guess some could be lucky to have barns already in place as well, but my big coops cost me thousands to build and that doesn't include my time/labor involved (which I never account for).