Design AUTHORIZE.NET PAYMENT GATEWAY on website

We need a payment page designed for both credit cards and paypal. Background: - website is built on wordpress - be aware we are using a bunch of plugins: chat (iflychat), forum (bbpress), user profiles (userpro), etc Requirements: (1.) Flow (1.1) Credit card - User should be able to choose from PayPal or credit card payment - After selection is made, the appropriate fields will populate underneath - User should then be able to click "next" button which takes him to confirmation page. - On confirmation page, user clicks a button to submit the payment. (1.2) If paypal selection is made, then the usual transfer to paypal site is fine. (2.) This page has to be implemented in no longer than 48 hours from the time the project is awarded. Time is crucial. If you don't work weekends, don't apply. If you cannot get it done within 48hrs , then please don't waste your time. (3.) Freelancer has to have previous experience designing such pages, especially with [login to view URL] API (4.) The payment page has to with current registration process and assign the appropriate membership level. (5.) The payment process needs to be tested before delivery. I don't want to see 1/2 finished job, where I have to point of 10 things that need fixing.