I've seen Telstra put in underground fibre, and its not expensive, think a team of 5 vehicles, 4wd cutting fences, then first d8 dozer doing initial cut with plough, then second dozer, doing another cut and laying the cable, then another dozer driving along behind making it all flat, followed up byt another 4wd putting the fences back together.

And whats more the speed probably 2 to 3 kph.

However, when you consider that many remote cattle and sheep stations can be more than 500 km to the nearest service centre. (The largest station in Australia is 36,000 sqr km or 6,000,000 acres). Its more than just a few days work to get out there.

(Remember many remote stations still fly to town, have a weekly mail run truck that delivers all the day to day needs, teach the kids ont he radia, and fly doctors in for emergencies and live on generator power)

for a number of years, at my previous job, a number of guys went on an Australia day ski on the backside of Mt Kosiosco.

As I remember (it was a few years ago), it took something like 6 hours to hike from the nearest road, for about 20 minutes of downhill summer bliss.