28 May 2010 at 19:01 - 7
Solo farming is the slowest way of grinding money normally. Feather farming is probably the fastest consistent source of money, and that is about 7k/15-20 minutes or 28-35k/hour. This is extremely slow compared to say, DoA, where you get many more gold drops (more max mods = more money) and gemstones, and also the consistent reward of gemstones and quest gold. You pay between 2-4k for cons and make back 5-6k with the quest rewards. Add on top of that 1 Margonite stone (3-4k each), 2 Stygian (3-4k each), 3 Torment (2k each), and 4 Titans (5k each), you have well over what you have achieved with feathers, plus it is much more fun.
The next most profitable are all speed clears. Most of them you break even or make a few thousand gold every run (UWSC is most profitable on a solo sin area, you can get 3-4 ectos which is about a 20k profit), then you also have the reward chest.
In terms of reward chests, here are the most valuable in descending order (HM):
NOT PUG FRIENDLYUW Chest (Guranteed 20k + chance at a rare drop, most worth around 90e, Mini Dhuum worth upwards of 750-800e)- 2 Ghastly Summoning Stones(5k each), 1 Ecto (7k), 1 Scroll (1k), 1 Phantom Key(475g), 1 Lockpick(1.25k), 1 Diamond (400g) + 3 random drops (ranging from 400g-hundreds of ecto) Investment - 2-4k in Cons and 1-2 hours
PUG FRIENDLYFoW Chest (Guranteed 5.5k + chance at rare drop) - 1 Obsidian Shard (2-3k), 1 Lockpick (1.25k), 1 Scroll (1k), 1 Onyx (500g), Obsidian Key (750g), +3 random drops (ranging from 200g-120e) Investment - 1k and 30 minutes-1 hour
PUG FRIENDLYChest of Kathandrax (Guranteed 3k + chance at an Emerald Blade or a good req. Astral Staff) - 1 Hammer of Kathandrax (3k) OR quest reward (1.5k), 2 random gold drops (ranging from 200g to 120e) Investment - 1.5k in BU and ~10-20 mins
Then the rest of the dungeons, Shards of Orr would be next best because you break even and have a chance at a BDS, then the rest of the dungeons, in descending order of the unique drop's value.