Wordpress MU Business Directory

I am developing a Business Directory website using Wordpress MU so that businesses can have their own blogs on the site. It will also use Buddypress. I would like to have a plugin developed that would apply category and subcategory fields applied to the member profile and a directory like page that filter and returns member blogs according to the category and subcategory chosen. I am to retain all ownership and resale rights for the plugin. ## Deliverables Please include in the bid the cost of making this a plugin that I can market separately.