The problem is that it depends hugely on where it is and how many other people have it.
Citywide our city is doing it for a little more than $2k/home. The parts of town on poles will be cheap and it'll cost more in other places where they need to trench, but because the penetration is so high, the cost is low. It also helps that our city run their own power and water so have a lot of existing poles, trenches, boxes and easements that they can leverage.
We ended up installing it at work in another city and it "cost" $23k to run fiber about 1500'. We ended up not actually paying that and I suspect that was marked up some, but it probably wasn't unreasonable for that kind of underground trench distance.
I'd probably pay $2k to get it at my house, but I'd have a hard time with $23k. And that's only for a 1500' run, it could easily be more than that. I've heard of people with homes in the mountains spending upwards of $200k to get power run to their properties.