I need to link via a 19 mile RF path and need some advice and guidance.

Near site is on top of a building with 3" pipe available up to about 25'. Far end is on top of a mountain at 2500'. Clear shot, no fresnel issues.

I was considering the Ubiquity Air Mesh with the larger grid, however the specs put it near its maximum range. 

Anyone with real world experience that can provide suggestions? 

Ron, N1AHH