Ask the fiscal archivists at the Whitehouse---some places actually took the solar panels that were in there off their hands for fwee...museums are usually pretty good about stuff like that though.<quoted text>
That roi is original investment only. Whats the annual maintenance costs?
It's the storage places holding the rest of the useless materials that add up in costs.
(See: CARTER-because REAL nuclear physics degrees are pretty good things to have.)