completing website rental application

I need help finishing this project. The majority of this project has already been completed using CodeIgniter framework. The rest of the project should be finished using this same framework. Database dump file, config details and code that has been completed to date will be provided. What is already done: 1)Static pages - Home, Contacts, About 2)Membership features - Sign up, Sign in, Sign out, Profile editing 3)Private vehicle pages - user vehicles list with pagination, adding vehicle, editing vehicle, removing vehicle 4)Common vehicles pages - all vehicles list with pagination, vehicle details, order form What needs to be finished. Paypal checkout and invoicing. Calculation of the total price and charge for a % of price as a deposit. Emails and invoices sent after payment Reservation availability check Tweaking to the order form Some minor additions may be required I believe search functionality has already been added but am not 100% sure. The order form has been created but i am not sure if all functionality has been added to it yet or not.