Recent reports mention Gwynne Shotwell describing the factory being built at Starbase as capable of producing around 3 Starships per week. If such a factory works for a year (which doesn't look like a long time for a factory) that's ~150 Starships. 150 Starships each have a chance to launch about twice a year if the launches are daily.
Surely numbers should be modified, some of them don't look right. First, we are probably going to have (way) more than 150 Starships. Second, a Starship is likely going to fly (way) more than twice a year. It's not a Space Shuttle after all. Next, what about those plans - Moon flights, which need refueling on low Earth orbit; Mars flights which need the same; all other flights - like orbital stations, sending probes to planets, space telescopes; finally, business class-like suborbital hops for passengers on Earth?
All of that requires a lot of places to launch Starships. Unless some plans drastically scaled down, it seems like we'll have to see an industry for launchpads growing and prospering in the near future.