If you've got line of sight then current (cheap) tech should do just fine. Sure not 10x gigabit but you can def get some decent internet...
Detour paragraph - background - Internet has historically been pretty sht in South Africa so a enthusiast spider network of point to point links sprung up much like the ham radio movement. Government decided to OK it as long as its not commercial & doesn't deliver internet services.
Anyway...the WUG websites (JAWUG, PTAWUG, CPTWUG - being Johannesburg/Pretoria/CapeTown) have lots of beginner style info on it (will trees and leaves in block it etc)...plus info on cheap kits...plus there are loads of people there that know this stuff in wild detail (as I said - 100% community driven so even the central high-sites are community run).