Ok, so if I understand this, there are two approaches...flock making more money and flock costing less money.
I would fall into the "costing less money" camp. Sure, we could easily sell eggs $3/dz from two or three times the number of hens, but not on our current property. Pretty much we'd eat all the eggs if DH's boss wasn't so found of them.
So to COST less money:
1. supplement store bought feed and supplies: acorns, free day old bread, kitchen leftovers, butchering scrap, whole grains (such as deer corn), growing stuff (greens, sunflowers, corn, millet, other grains, sunchokes; insect larvae), bags of gathered leaves, mowing clippings. Free range if safe and possible.
- - -problem: given more than half a handful of corn or other carb treats, they don't lay well the next day or two.
2. feed management: measure and limit to timed offering of that expensive bought feed, protecting feeders from mooching squirrels, wild birds, rodents and other critters.
3. flock management: keep only the birds that mean something. Either function, form, or emotional attachment. If the bird is a disappointment, sell or eat it. When obtaining new birds, already have firm decision made on what it will be; quarantine.
4. flock health: patrol daily for hazards (sharp things, loose fencing or boards, security), treat water with ACV, keep on top of area cleanliness, internal and external parasites. Train birds to handle easy for frequent inspections. Quarantine everything - new birds, suspicious behavior or symptoms, the slightest hint of illness.
Miss anything?