Heard abaout a University which used this to connect the Network in two Tours in the eighties. Place had a lot of fog and birds- so there where problems, but connection was fast.
Highrises would be generally better for this approach- or some long atenna/tethered drone. At this stage though, wouldnt it be rather cheaper, to build a little softrobot and have it drag fibre along preexisting cable channels/stormdrains/sewers - basically just doing the infrastructure decent for cheap yourself.
There are existing solutions that use robots to install fiber optic cables in storm drains, sewers and other ducts. Not that cheap, but the biggest problem is that you need permission of the infrastructure owner to do it.
Highrises would be generally better for this approach- or some long atenna/tethered drone. At this stage though, wouldnt it be rather cheaper, to build a little softrobot and have it drag fibre along preexisting cable channels/stormdrains/sewers - basically just doing the infrastructure decent for cheap yourself.