I have been building wordpress sites for years and also built the Auction Ad Plugin for Jeremy Shoemoney back in the days when he owned Auction Ads, so have good experience with it.
Also been doing SEO for a while and one of the obvious and easier methods [if you can afford it] is a blog/site network based on different c-class IP's.
I have a set of 100 blogs I set up for a client [friend] on the basis that I can monitor its performance. It has a unique set up in the plugins and the way vicinity and themes for each post are created for best performance.
So I am wondering what the interest would be from the community if this was done as a co-op?
So the more people that join the cheaper it becomes.
You sign up for a minimum of domains ie. 30 and build upto 100 [unless you can get the domain names straight away], give access to a custom c-panel fantastico for a one-click install of wordpress and all the plugins.
Provide details and instructions for best optimization of the site, content, backlink, etc.
The example would be 20 - 30 members pay $59 [example], the more that sign up the cheaper the price becomes [the newer members pay the same fee and it reduces for older members until balances out]
just a thought.