I calculated it all on my forum in the bazzar after 5 days of mining for about an hour i got 11 gold ores you get an average of 2 gold ores(on BP of course). I also got gold ores from the two ore veins in the sanctuary battle on boat 4. The map that contains the bridge with water below, has two ore veins hidden in the water. I got 2 gold ores from there after 5 runs. It takes a fairly long time though, having to go through and kill ever white or argonteil then a few more maps till you reach it.
If cash is the thing you want, it might still be worth it. Everwhite scales are not yet cheap on the market. Just a thought :)