Well I guess you have figured out how to take all the cost out of a cow.
This is quite an acomplishment you should write a book.
Until I can get free diesel, fertilize, vet supplie's no taxes,insurance or upkeep of equipment.
I quess I am one of the dumb asses that has been doing this for decades is stuck doing it all wrong.
You might want to contact TAMU as they regularly put on seminar's about cost and profitablity and they ain't got it right either.
What truely amazes me is absolutely nothing is free in life it has a cost, bore by someone.
Hat's off you have figured out what no one has been able to do raise a cow for free.