Thanks for the replies everyone, this is some really good information.
Thanks Miles, the ranch is in Athens, TX. Rainfall sporadic in warmer months, but when it does it pours.
More details on the sheet mulching system I have in mind. I'd like to try no till and go right on top of pasture grasses (Bermuda & Costal). I'd start be cutting grass low, then several sheets of newspaper, coffee grounds, dried grass clippings (carbon), aged cow manure, dried grass, coffee grounds, leftover hay. I plan to design beds (which act like swales) on contour. I'll put cardboard in the rows covered with a few inches of wood chips.
From what you all have provided, maybe I'll replace the aged manure with finished compost. Any other thoughts are welcome!