Keep in Mind I sell chicks small scale. I might have 200 chicks today and 50 tomorrow, then I might not sell any for a few days----you never know. I keep 2 factory brooders in one of my buildings. Each week I hatch a new Batch of chicks----one of the factory brooders is throughly cleaned for the new Hatch. The 2 week old chicks are moved out the factory brooder to inside a old converted school bus. This bus has 8 more heated brooders(totes/cages with heat lights) BUT----BUT I rarely have more than a few going because I usually have sold all the chicks that I am NOT keeping. It also has alot more cages in racks 3 cages high with drop pans--I think there is 16 rack/hanging cages in the bus with Room for more if I want to add(Probably not but You Never Know---LOL).
The chicks stay in the bus till they are taken off the heat lamp, moved to unheated cages inside the bus then they are moved to outside chick pens. By this time I am usually down to a few of the breed I am wanting to keep because by this time I can tell the roosters and most all of them are sold. These are them moved to the back of the farm to where the 57 chicken pens/yards(at this time) are to a new pen/yard that is waiting for this new breed.
As far as feeding---probably 30 minutes to a hour per day---according to what I got to do. BUT Just for Info I only had 30 to 40 chikens and 2/3 pens/yards about 1 1/2 years ago. So I have spent ALOT of time in the last year setting up new pens----each with a coop, water, shade for summer etc. At this time I have about 500 chickens/chicks and Just for more Info I buy 1000lb of feed every 2 weeks from my local Tractor supply and a ton of whole corn about every 6 to 8 weeks that I grind and Mix in supplement that is mixed with the factory feed. Hauling, grinding feed etc IS NOT included in the 30min/hour per day time---LOL. I am B U S Y with my chickens!!!