Concerns about cost per flight aside, how would one go about locating spaceports near enough to urban centers for this concept to be viable? If a fully fueled airliner crashes in an urban area, it’s devastating. Now consider a fully fueled rocket — would the crash be an order of of magnitude worse?

Perhaps I still have the “rockets are inherently dangerous, mitigate bad outcomes by isolating them” mentality. Maybe designs will get the the point where the likelihood of a bad outcome is so remote that it would make sense to locate a spaceport in the same way one locates an airport. Or maybe the spaceport could be way out there and just connected to the urban center with high speed ground transportation. Either way, if spaceports become commercially viable, it’s an interesting thing to consider from an urban planning perspective.