I'd like to know this also. I've got loads of loot and items and I'm always hitting the weight limit, but all the stuff I find is worth hardly anything. I want this piece of armor that costs 4.5k but I don't think I've ever had any more than 800 or so. You don't seem to get much for doing side quests.
to be honest the best way to get rich in this game is by simply being frugal with your spending, don't just buy everything that catch your eyes.
and don't even bother with that overpriced armor..
I guess if you really want to farm gold you can, the best way is still by hunting monsters and selling the parts, the problem is finding enough monster spawn, since they don't just appear in hordes :/ well maybe not until chapter 2.