Yeah, making money doing crafting leves is kind of an inefficient waste of time and leve allowance(unless you're leveling a craft at the same time). Wear rings and other accessories(rubellite rings are good and cheap for melee dps), hop into a praetorium, CM run, dark devices fate and spiritbond the accessories and then sell the materia on the market. Easily the best way to make money if you don't want to bother with crafting or gathering.