> It is too costly to dig and lay new fiber to the home underground

Digging is not required in many locations. Citywide rollout in Christchurch (400k people, low density) mostly used horizontal underground drilling: https://www.youtube.com/watch?v=TzGZl0jKRS8

New Zealand (similar size & population to Oregon) with a population ~5 million, used a lending model to fund a national fibre rollout in a private-public partnership. The Government lent money, but expected the project to have a final cost of ~$500M USD after loans repaid in 15 to 20 years. https://archive.vn/20170807221541/http://www.stuff.co.nz/bus...

84% of NZers can access fibre, and uptake is 64% and rising.