It's not that easy, but it's not that hard either. It's just basic stuff but the hard part is keeping it up day in and out. I mean if you think managing 50 or 60 blogs is easy well with the right script it's not hard but it does get old.
I'm not to the 60 point yet but I have around 20 or so total blogs and I do about 4 to 5 new posts per day on them. Even that gets old and boring but I figure it's better off to do original posts vs the crappy RSS feeds everyone else uses.
Now I will admit, that some of the domains I've used for these new blogs were older domains that I've had other stuff on. So some of them had a little SE traffic already but not a hell of a lot.
Anyway if I have a layout already made, I can have a new blog set up with it's first post and have the trade script installed and ready to go within 30 mins. I don't use word press I use
Blog Organizer which is a paid script but it's worth it because I can admin as many blogs as I want from the same admin. I then use a free trade script sloth trader to trade traffic via toplists.
See most blogs don't trade traffic very well with other sites and most bloggers don't try to change this. Personally I treat my blogs like a TGP that trades traffic via hard links. So my layouts are built to trade traffic via toplists as I find that traffic just as important as SE traffic.
So because of this, when I add a new blog into my network of blogs it will normally have 100 uniques by the end of day one of traded traffic. Generally they will hover around that size for a week or so then they slowly start to grow.
Anyway between the older blogs I have and the new ones they normally range in size from 2500 to 100 uniques a day. Most of the new blogs I have are around 250-500 day at this point. My goal with the 50-60 blogs is simple.. It's hard to build a new site that trades traffic via "top list" (no skim) and get it to 100k daily uniques. So I know I can build blogs that can get 2k per day fairly easily. So 50 blogs x 2k a day is 100k traffic.
My goal was to take a fresh network of sites and turn it into 100k uniques daily traffic and do so with very little existing traffic. I'm trying to hit the 100k mark within 6 months time I'm into it about 20 days now. Anyway it's just to prove to myself that I could start fresh with almost nothing and build a good sized traffic network with no skimmed traffic.
So far after the first 20 days or so the blogs are around 10-12k daily traffic total so I'm 1/10th the way there. Of course that's not 10k uniques daily on the entire blog network because they all trade with each other. But counting uniques per blog and totaling them it's around 10-12k. As sites grow I'll bring in out side trades which will bring up the uniqe precentage across the whole network.
As a side note I've yet to submit the blogs to any link directories at this point. I wanted them to get a little age before I spam the link farms too much.