Have you considered wireless network bridging and/or directional APs/antennas? Both of those could enable wifi to get where you need it.
We do use some of that for building-to-building links. What would be nice is if smartphones supported a lower frequency band, so we could have some connection without having to be near a 2.4ghz hotspot. Our cell service pretty bad here.
Whats with the 850/900MHz cell bands these days? Do providers where you are use spectrum that low? I guess at lower frequency maybe the data capacity is lower as well
Verizon uses band 13 (700Mhz) but it just lets them put the tower even farther away.
There are wireless options which operate in the 900mhz or lower bands, depending on what your use case is.
433Mhz LORA, for example.
Maximum possible throughput for LORA is 27kbps though. That's not a WiFi competitor unless you just want to link some sensors.
WISP (wireless isp) operators have all sorts of neat directional gear that iirc is 900MHz because of the distance they can cover with it.
What would be nice is if phones could connect to a low-frequency wifi. We have 2.4ghz hotspots here and there, but a long range low speed signal that a phone could use for WhatsApp or similar would be really handy. Our cell service is very poor here.
if you have power on the other side of the farm, or if you can run POE power, the Unifi UDB Pro could be useful: