We spent about six months looking for new rural property. While broadband access wasn't a
must have, it was definitely a
really would like to have, so it was something we kept in mind. Because of my wife's work, satellite broadband is out for us, due to the latency, so the two access means we looked for when we considered a piece of property were cable and DSL, with cell tower availability in the back of our minds, too.
One thing became self evident pretty early on. With cable, it made a big difference which county the property was located in. In some counties, even very rural property had cable service. In others, our present county included, if you weren't in or near town or a high end subdivision, you were out of luck.
For DSL, the story was the same everywhere. Low population density equaled no DSL.
We ended up buying a nice chunk of property in a really low population density area. It is a the very end of a very narrow (12 feet wide) winding country road with only few houses on it. As is typical of the area, there is no DSL, but it does have digital cable.
The difference seems to be the cable franchise rules. We bought in a county that apparently had the foresight to require the cable company to serve ALL the county residents, and not just those in dense population areas. Our present county has a taxpayer funded cable TV board. As far as we can tell, it does absolutely nothing for the rural residents.
When we do build on our new property, we may stay with ISDN. It's still the cheapest way to get two phone lines, but we will use cable for Internet access