I will have a way for you all to get Quests to get money (they will be dangerous though and having a job would be safer), but that won't come until after the first major plot event. 

Its either that or you grind monsters until you encounter boss monsters they give money and rare loot. 

Also if anyone has been picking up the Imp Claws and Horns that have been dropped (I have mentioned them a few times but no one ever said that they picked them up) those can also be sold for a little bit of money (at least a couple thousand yen for each).