what are you talking about? with 44 billion dollars we could put 44 of those $100 units every square kilometer. the issue to increasing the amount of bandwidth per transceiver to anything higher than 100Mbps was that we need to be able to LEGALLY USE more of the spectrum.

44 Billion Dollars / Area of US = 4,477.63 U.S. dollars per Square Kilometer

I can build a wireless transceiver for well under $1000 that can provide 100 Mbps coverage to 1 square kilometer (564 meter radius). It will cost more like $100 each if we're making 10M.

The real hurdle isn't technical, but political: we need to stop licensing bandwidth to private corporations and start sharing the entire spectrum.