Farming Gold is the easiest way to generate zeny, and Impetrible Ragnarok Online makes it slightly easier! In Prontera just below the center waterfall is a Gold Room Manager!
The Gold Room with BOT security requires 1m zeny to enter. You will be required to answer a math question.
You can use any job to farm in the gold room but it is recommended to use a class that has a cart such as Whitesmith or Creator to grind out gold and load up your cart.
These mobs of dokebi drop multiple items so it can be tricky sometimes when ur in the zone! Use @alootid + 969 to autoloot just Gold!
Now Get Grinding!