Bah I have better ways of earning cash... Quests... gold minning... and clacker slaying
there are quests that give a good hefty payment... I want say which ones but snoop around a bit.
Gold minning, you need 100 trias for a rock pick, at least one skill point in minning or 0 (but be training it)... and a nice buddy to show you to the best gold minning spot
clacker slaying... If you built your character right, you should NEVER have to step foot in the sewers... I know this because I never had to. Once armed with a weapon and at least lvl 3 skill in that weapon, you can take on clackers.. they're not as good as other mobs, but they do give better loot then rats, their loot sells for like... 8 tria... you'ed need to kill roughly a hundred to get anywhere..
Right now, warrior/miner is the best occupation, and renders the most amount of trias. Although I hope that'll change... pretty much you have to mine....