It was around that same timeframe that "TV Whitespace" was going to become the next big thing.
Anyway, LTE should be the literal last option. It requires more than 2x as many towers as fixed wireless, with gear more than 20x more expensive. That's also more than 2x-3x the required amount of of battery backup systems, networking equipment, and land / tower leases.
If you have extreme density, you NEED fiber and you need WiFi. You extend from the fiber network with extremely high quality ngFW. To fill gaps, use satellite.
Fiber requires a certain density of subscriber/mile(km), the same as any technology.
Even with 0 labor cost, you still need to get conduit in the ground (materials), fiber, terminations, switching, routing, OLT/ONT cost, handholes, any permitting or utilities location, horizontal boring equipment , jackhammers, splicers, etc. The upfront cost is many, many, many times higher for fiber and if you're okay with your cost-per passing being more than you would ever make on customer ARPU, then sure do that. Even if labor cost was 0. And it will take YEARS longer to deploy and see a return on investment from, of ever.
It doesn't matter if there's broadband to the location if nobody at the location can afford it.
If you want broadband, LTE is the worst option.