Non-line of Sight solutions: Reflecting board.
Passive reflecting board redirecting a 5.8Ghz signal in middle of a 3 mile path with extremely good results. 3′ parabolic antennas are directing a 200mw signal in a 6˚ beamwidth.
We have also redirected a 2.4 Ghz signal with satifactory results in Ettersburg using a precision flat 7′ x 8′ aluminum board reflecting a signal from a 120˚ sector antenna.
These solutions will have to be engineered on an ICB (individual case basis) and you can figure on a minimum of $2000. You are always welcome to come up with your own solution.
A radio is placed in a location, often a neighbor’s house, that has line of sight to our access point and another radio is placed within 300′ of the 1st radio in a location that the end residence/business has line of sight with. It is very common for a residence/business to be in a valley with line of sight to a ridge/neighbor that has line of sight to one of our access points. The radio equipment install/cost for this setup is around $750. The relay location can be used to serve multiple locations. This is the cheapest way to re-direct a radio signal if you have power at the repeater site.
Solar power works great for areas without electricity, but is an additional cost, approximately $1000. The radios we use consume 5 to 7 watts each at 24VDC.
We often have a tree climber install an antenna high up a tree for better reception.