You are missing that use of solar for real on a domestic and community basis requires a solar indexed UBI, otherwise how will it be monetised? How exactly will money be created to represent each Joule which was given for free, nothing asked in return by the sun? Failure to monetise it will be the real physical reason the economy failed, if it is not monetised, because money becomes something that can't even represent the only growing energy product.
We are talking big money, because money is energy.
Money that isn't energy is nothing, worthless. We are talking hundreds of billions in smaller countries, trillions in bigger countries, the value of all utilities energy companies put together.
With that money forget cost, it's not an issue.
So please stop trying to trash it dude, it doesn't do you or anyone else any favors to keep banging that old drum, it's all played out.