Well now.
Girold has got the right idea.
Tourist destination AND a place to train new adventurers.
Two MAJOR money makers.
This manga will probably gloss over it, but one of the big issues modern tourist destinations have (such as Venice in Italy) is having too many tourists. It would be great if Girold set regulations early on, limiting how many available hotel bookings and tourist visas are possible. Might also be a good idea to have designated tourist districts for the hotels and entertainment. This would give locals breathing room.