I was wondering when it makes sense to setup a blog farm to launder link juice. I've got a few sites up and running and with a moderate level of SEO work and some time (2-3 mos) they are all doing rather well. In fact, three out of five of my niche sites are sitting in either the #1 - #3 positions. Reading on setting up blog farms (not full autoblogs but unique content sites all promoting one money site) seems like a lot of work. In fact, it's like doubling or tripling the work invested into the main site. Anyway...at what point does it make sense to invest time/money into a blog farm? Is there some definate point at which the competition ends up being so fierce that you have to take your game to the next level?