Project AirGig should be considered
I hope that the RSF Association board has someone talking with AT&T about their Project AirGig, which is scheduled for field trials this year. AT&T may even be interested in the Ranch as a next level test site in that Project AirGig seems to be a perfect fit for the challenges facing the Ranch in solving its high-speed internet problems. (https://about.att.com/newsroom/att_to_test_delivering_multi_gigabit_wireless_internet_speeds_using_power_lines.html)
This seems like it would be perfect for the Ranch at a fraction of the cost and disruption of laying fiber, and as we still have above-ground power lines there should be sufficient locations.
Rancho Santa Fe