The temptation is to let companies use new frequencies wherever they want, but in the longer term this results in chaos, and the only solution is to rip it all up and start again (at huge cost and disruption to service).
The only workable approach is to design an interlocking network of spacial and frequency allocations and then stick with it, and make sure that each block is fully utilised before moving on to a new block.
With all of the above considerations, the cost of the actual network hardware is negligible, especially if the consequence is that poor villages will have to abandon their total investment in equipment at some arbitrary point in the future.
And it would be probably much easier to try such technologies on an Indian village(low spectral use, low buildings offering little interference, relatively cheaper labor).
[1]https://www.seas.gwu.edu/~cheng/Publications/2012/DSA-WC-201...
Also maybe it could work in a city, where neighborhoods join together to request a license from the city and the city will work with neighborhoods choosing suitable locations as to not interfere too much with each other.
But of course it requires a political campaign and this might be a trigger to start that, with facebook also helping.