Many other advanced, rich, highly unionized countries.. like say, France.. are able to build subways at 1/10th the per-mile cost of NYC. So its far more than that.
But that doesn’t give the socialism bad windbags a venue to derail (ha) the conversation. Building a working mass transit system shouldn’t be a partisan (ha) shitshow.
The US cares about none of those things and still pays insanely high prices for bad infrastructure. The US cares about businesses, and building good public utilities is fundamentally at odds with a for-profit model.