> Contemporary advancements in manufacturing have easily replaced skilled craftsmen used on historical classical buildings.

No, they haven't at all. Quality and integrity have just been compromised and degenerating for the past century to meet the limited capabilities of consumer driven mass production. There still isn't a machine that can carve those corinthian capitals or hot rivet together the steel and glass vaulting. You'd either have to substitute a shitty imitation of the genuine article, or you would have to develop and automated technology capable of replicating what those skilled craftsman could do; which would take decades to develop. The truth is that it doesn't matter how much money we have; there is no longer a sufficient skilled labor pool. It would take a generation just to apprentice a sufficient number of new craftsman in order to be capable of executing a project of that scale.