Rick Berman was the executive producer on Enterprise. Given that he was born-and-raised in New York City, it’s possible that the answer is, like, Westchester.
The writers on Star Trek seem to like to make references to where they’re from. Bozeman, Montana is the site of first contact because Brannon Braga comes from there, and theres a USS New Jersey in STP because Terry Matalas is from New Jersey.
I like Bozeman as Zephram Chocoran’s home base because there’s a good chance that Montana might have been spared a direct nuclear strike. Same logic applies to why San Francisco looks so futuristic: it for sure got flattened entirely by a nuke, so they would have had to build it back up from nothing afterwards. I’m guessing the Golden Gate was still partly standing and they rebuilt it for the same reason we keep other historical buildings/monuments around.
No idea if any of that is canon, but if we aren’t overthinking Star Trek then why are we doing any of this?