First game, 72 gold. I lost half my vikings beating a draugr in a mound, but after that I was able to find two more. Once I had them all equipped with magic swords things became pretty smooth; villages couldn't hurt me so I could just roll them up at will.
It's not clear to me if a Magic Key is used up opening one Golden Chest. The rules imply it isn't, but I might change that in my next raid; it makes things a little easy.