According to L2 Portal there is a way to skip the 100.000 adena donation, the Npc "Gupu" wants from the player.
But the 2nd option in Gupu's conversation doesn't work. (or doesn't trigger the next state condition)
Assuming you said you will not donate, he'll say something and make you close the conversation window. But if you talk to him again, he'll tell you to go to Gludio Castle Town and find Master Sorius
7658_1">Say you will donate that amount
7658_2">Pretend that you did not hear anything
But the 2nd option in Gupu's conversation doesn't work. (or doesn't trigger the next state condition)