I think that what will end up happening is that Starship will be used to construct larger spinning 'cruise ships' that will be placed into Cycler orbits[0] that

I think that what will end up happening is that Starship will be used to construct larger spinning 'cruise ships' that will be placed into Cycler orbits[0] that ships like Starship will ferry cargo and passengers to from the surface of both planets. The potential upsides of this approach would be better living conditions while in journey, with potentially larger accommodations and artificial gravity from spinning the craft. If these cruise-ships are designed in a modular fashion they can be added to every time they make a return orbit around Earth and will end up having a sizable population of people permanently living on them making their money providing services to the guests travelling between worlds. [0] https://en.wikipedia.org/wiki/Mars_cycler https://en.wikipedia.org/wiki/Mars_cycler