If it is of any consolation, I always need at least 3+ hours to install Win 10 and I live in a city, not in some remote area.

Sorry to hear your unpleasant encounter. I, being an impatient guy, do appreciate your frustration.

One thing I'd like to know.............
You said " It then actually took another 2 hours 20...

Seems to me you were using Windows Update to install Win 10 10586.
If yes, suggest that you try one of the following links and give it a try...............

Media Creation Tool :...