Interestingly enough, there is a man in South Central Montana with the exact same rainfall as you(two dot land and livestock).  He has increased his stocking rate by 225% over the past few years simply by increasing his stocking density and moving the herd around.  His rainfall is the same as yours and his growing season is probably shorter.  I maintain that it would work in your area.  Now, your pushing the envelope and someone from a 40"  annual rainfall area's pushing the envelope would be vastly different.....but the concept would be the same.

It is not my intention to try and persuade anybody.  Some would rather farm, some would rather work with metal, some would rather put up hay and some would rather graze.

The bottom line, the way I see it, is that mob grazing is an amazing tool that can be used, with very little cost, to vastly improve all types of soil, which results in vastly improved grasses.