I believe the useful life of windmills and solar panels is approximately 20 so the cost of enough solar panels and windmills would have to be refreshed 5 times over 100 years
***You are studiously avoiding the cost of posting guards over nuclear waste that's harmfully radioactive for 50,000 years. THAT is what we are comparing the costs to.
so your disposal cost would have to paid 5 more times over 100 years
***Your disposal costs would still have to be paid 20,000 years from now.
Let’s not forget the cost of lithium or one other storage system unlike nuclear power sometimes the sun doesn’t shine and the wind doesn’t blow because a solar and wind system is inherently unreliable without a storage system