Furthermore those people would probably want to eat somewhere while in town and maybe even visit a shop or two which would further boost the local economy.
That's a great theory, but the spaceport is a one hour drive from the town of Truth or Consequences. And "those people" are the extremely wealthy who have flown into the spaceport on their private jets. "Those people" aren't going to be driving for an hour to reach a town that has literally nothing to offer them.
Virtually ALL the (theoretical) revenue generated by the spaceport would never touch the local economy.