They are viable but I'm quite skeptical about accurately estimating the costs for a 10 year project. Concrete, steel, fuel, workforce costs fluctuate from a yea

They are viable but I'm quite skeptical about accurately estimating the costs for a 10 year project. Concrete, steel, fuel, workforce costs fluctuate from a year to another, let alone 10 years. We'll just have to accept that there are going to be cost overruns.