It can be a lot easier than digging trenches. Where I lived I've watched various google & TW contractors running fiber on existing utility poles. It surprised me how fast those guys can move, I'm talking a couple guys and a truck can probably do a few miles a day. Last time I saw it, they had a couple trucks doing some prep work ahead of a guy literally walking along under the cable pulling that spinner thing. They had wired from the office building I was in, down the road a couple miles, by lunch.

(random youtube video) https://www.youtube.com/watch?v=aUMjCvMxp-M