Verizon FiOS just arrived in my area. Before that, nothing. No cable, no DSL, only satellite and cellular. Verizon just ran about 1200 feet of fiber from the road to my house. Service is to begin next week. The fiber on the road is up in the poles, along with the copper.
I'll getting rid of DirecTV (which I like) and Excede satellite internet (which is way better than HughesNet which I had before).
If house lots are 50ft wide in a neighborhood, a 350ft radius might get you 25 homes. $70K seems like a high capital cost for so few homes.
Of course, if the speed drops off gradually but stays above 100Mbs at 1000ft, I can see that high a CC. Or if cheaper repeaters can extend the range while maintaining the 750Mbs.