PHP developer for managing/adding customers to New online booking system

PHP and SQL support required for new business venture.
Website and booking system already developed, business plan is to sell the system to other businesses for their use. This will involve quite simple amendment of a copy of the code and database in order to be fully 'onboard' new customers.
Work will be ongoing as and when new customers are sourced. Potential for lots of ongoing work depending on how succesful the business is.
Creative input will also be required, as site will need to be quite dynamic with various choices of website 'skins' moving forward. Great Opportunity.
Price is per new customer onboarded. Quick turnaround will be required for each site.