Solo farming is a wonderful way to beat the cost of paying for henchmen or other players. Each gold drop and item drop goes directly into your bank account instead of being split among 8 or 12 people.
Elementalist Solo Farm
This farm is easy and beneficial for new players and older players alike. One of the simplest builds in the game for a solo player. Specifically directed towards one area and one monster type you can gather many valuable items. Gold, glacial stones, gold items, purple items, blue items, runes, material items when you salvage, and tons of special event items during event times in Guild Wars.
Monk Feather Farm
Feathers can be hard to come by in Guild Wars and players pay a pretty big penny for them. Learning how to accomplish the feather 
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farm for a monk can erase your feather and money issues forever. Head over to Naphui Quarter in Factions with your monk and monk henchman for this farm. Make sure you research the correct build, armor, and weapon sets online before trying to complete the farm.