When you can earn 12,000 gil for ten minutes of work running a roulette as the role in need, the 40-gil ferry is basically free already – and teleport costs aren't worth fretting over, either.

That said, my main issue with "public transport" in this game is the increasing uselessness of the chocobo network, which used to be the slower and cheaper option and went to places that didn't have teleport access, but now only runs from aetheryte locations and can be more expensive than just teleporting there.