Who cares about her part-time job paychecks? The airhead author forgot she sold the super spear. She probably has as much money as someone who sold a Lamborghini for an appropriate amount of money. Not to mention her dimensional space is full of treasures. It would be exceedingly strange if there weren't chests full of coins and jewels there as well. You know, the kind of stuff people would keep in their secure, personal magic storages.