In fact, the sideline depends on your own needs, and anyone without money can do it. Alchemy can be free all the year round, and Beidi mixture can be eaten for free all the year round. It is also one of the top 46, and it can double the frost dragon time. Leather can be embroidered with a little force. FM is also stronger than 46 rings. Engineering is purely fun. (Personally) Jewelry can use better properties than others. I still suggest FM and alchemy.