Marketer's SEO Service - Your Thoughts and Ideas?

Hey,

Im trying to conduct some market research and find out if there is scope for a Marketer's SEO Service.

Wherby instead of selling a set number of backlinks from PR's of 9,8,7 etc but instead offering a guarantee of top place for X number of sites/minisites/articles/videos on google between X,XXX competition and X,XXX,XXX (on a scale going up to give a rough idea of difficulty).

The more the competition the more the price, however difficulty to rank high will put the price up too. So for instance you would have a pricing of $7 to $14 for 0 to 10,000 competition, with 0 to 100 backlinks.

Now i would have to refuse some keyphrases however the payment would be based monthly and i would work with people and their businesses each and every month while they pay and work constantly on getting their allocated number of sites/articles etc to the top of google.

So it would be a fixed montly fee kinda deal!

Now im not looking for anyone to sell this too just yet, im just looking for your ideas and opinions and most of all how much you would be willing to pay for something like this?

Think of it as a online marketers path to seo services just like the same path offline small businesses take yet at a lower price!

Tom Brite