The amount of money you make is incredibly dependent upon your server. I would pull in 40k a week from playing casually (checking once a day or so, not going undercut-crazy) on Ravenholdt. The population there is medium at most. I've since transferred to Earthen Ring and I'm lucky to pull in 1k gold a day. The population is much higher and glyphs (my market) isn't churning in the cash.
However, this mod is amazing. The geniuses behind this deserve much praise.