SEO Optimisation for 4 websites and growing

Require SEO optimisation of websites created by eBookit for our customers.
These are bouncy castle operators operating in various areas. Help may be required by them in setting up google analytics.
I would also require all eBookit customers to rate very high in the organic listings for their respective areas.
An example: Bouncy Castle Hire Manchester
This could be ongoing project for existing and new customers hence monthly cost for each must be very reasonable as needs to be cost effective and fit in with the business model.
I am open to ideas but perhaps as a starter there should be 5 searches per business which will rank at or near to top of front page on google.co.uk and BtYahoo.
Good communication style and proven track record required with evidence for this interesting project.