Well Tap, I thought maybe someone better qualified to answer would respond to your question.Since nobody did I'll give you my response. not sure really what you want to know, so here goes.
I started my illustrious career with the big outfits at the Padlock
I was there from from 1984-1988 from1988-2000 I worked for the ZX,MC,Whithorse,Roaring Springs in eastern OR
I worked for some smaller places too,but you seemed interested in the bigger ones.
Don't believe everything you read in magazines about these places,
most is just a bunch of hype. why you ask??? what a cheap way to advertise for help for these ranches,to get guy to "flock" there.
It works!
a ranch might run 10-12,000 mother cows but they don't run them all together. divide and concur is the rule,big ranches and crews are divided into units or divisions, 3-4000 cows/unit seeems to be about the most effective size for the work to be handled efficiently
Then again divide and concur comes into play again.
Floyd Workman,at the Padlock(there's a name heel fly should know)always said if you threw together more than 500 pairs you made you're first mistake of many that you were going to make that day.
The big places are like any other business,try to keep overhead low,
production high,most seem to have a large pool of resources to draw from
and economics of scale come into play.
I think the best part of working for bigger outfits was the segregation of crews,you didn't see mechanics on half broke horses trying to sew up prolapses and you didn't see cowboys trying to mechanic,etc.
It's a great way of life for a young single man,I'm glad I went and did it.
It's a tough way to raise a family,although lots of guys have done so.
But I think their family had to sacrifice for them so they could do what they wanted to do,rather than them sacrificing for their family
I don't know if that even came close to what you wanted to know,
but I tried!