My brother had a contract to haul many of those into place in both locations
and had a small contract to assemble several of the towers near Tehachapi.
It was great guns until Raygun pulled most of the tax credits and many of
the companies went out of business leaving small contractors like my brother
holding the bag.
Wind power is cheaper than solar though with some of the same disadvantages.
An issue of Home Power within the last year had a comparison article on home
wind energy systems. They have had several articles on how to site wind
towers, a much more critical issue that with panels.
Cheapest by far is not using energy, then is hydro, followed by wind, and
then solar.