What is the best way to make money in mabinogi?

I founf a cave that leads to Qillia to Vales and is in a under ground tunnel and once you go there you can find chests that have rare items in it and lots of gold. But you need to find a key in the under ground tunnel.But what really helps you to find these keys are botts. the bots can help you find keys. So find them and get the rare items and gold