Fixed wireless (11/24/60 GHz point-to-point antennas) is pretty good, and the hardware would be a few thousand, but I wonder if there's an issue with the funding where it needs to be actual fiber for some reason.
This was 20 years ago now, but the service was very reliable using Motorola radios. Relatively low bandwidth (4-6mbps, not bad for the day) but you could on a good day do that at a few miles out.