Lol. I restarted my file and I'm a little bit ahead of you! (SPOILER)Henne Mines.

Make sure you don't waste all of your money before you are about to go to the west-most section of the map. Once you have activated a red switch and agreen switch, then you return to Dyce and buy what you want/need/can. It helped me out.(I won't mention specifically because of the variations you can have on your characters.)

Here is a hint, If you buy things, try to see and check if you can survive the dungeon, you won't always need the best equipment to beat a dungeon.