What about the old fashioned approach of opening churches wherever they go?
Could happen that way - But there are strong Dutch communities in prime cattle country (Bozeman/Belgrade/Manhattan, MT, | Graingeville, (among others), ID). Unlimited water, lots of local farmers (grain, feed), BLM or Injun land to lease cheaper than snot.
Why re-invent the wheel? Besides, it's nice to be in a community that knows how to spell your name...