Chocobo porters helped me out a ton when starting. I remember doing leves in quarrymill and catching that taxi back to Gridania before walking back to Quarrymill for the leve. Done that a few times....god it was awful lol but it gets t the job done when needed.
You wil build enough Gil tho to not worry about it. As said. Dungeons, leves, weekly challenge logs, msq, side quests, selling stuff your retainers find or stuff from msq you don't need. Eventually a quick fetch quest side quest will grant you 1500 Gil and even if you have to port once at max cost to deliver the frog eye to someone in Gridania from Kugane that's still 501 profit. Just play the game and You could and should probably have a cool 80 - 100k by weeks end no problem. More than enough to teleport without financial woes.