Easy Gold
If you have high Mercantile gear (1000) you can buy permanent gush from potioner in Hibarki village then sell them to sorcerer in Faircraft hill for almost double. I bought all about 27 in Hibarki for around 700 gold sold them in Fairycraft for around 1200. If math is correct I made12000. I think without Mercantile its 1100 in Hibarki and 2800 in Fairycraft hill for the same permanent gush. I didn't try the homemade gush.