With my set up, we automated everything we could. 100# auto feeder, 5gal auto waterers, anything to save us time. Time is money after all. We spent maybe 15min/day with the birds because of this. My last batch of 50 Cornish cross, we butchered between 8-10 weeks (roosters first) we charged $15/bird and made money. I fermented feed after the first 2 weeks, gave anything extra from the garden and farm. I don't remember the exact number, but we had just under $10 in cost, and about $5 in profit per bird. Most were sold before they were even butchered.