[asdefghyk]

20 Billion is a rough guide. Apparently this estimate is approximate to 100% It also depends on lots variables, like - for a large powerline the towers can cost $1M each. I also assume the initial cost does not include maintenance costs.

[Retric]

Maintenance costs exist, but they can also extend the lifespan well past 50 years. So it’s all a big cost vs benefit tradeoff where maintenance occurs because it’s a net gain.

The point is the upfront costs aren’t actually that significant.