Joomla Virtuemart Extension

This project should be pretty straightforward – Basically, I want to be able to sell the gift of a service that can be redeemed at a later date by another person. To do this with Joomla's Virtuemart, I'm going to need to: 1. Add a "product availability" tab to a Virtuemart product's details in admin panel where dates in coming months can be made available 2. Ammend Virtuemart so that a random 12-16 digit code is generated whenever a gift is purchased. This code should be order-specific. 3. Create additional order status options, including: ordered, paid, scheduled, complete 4. Build an extension similar to [login to view URL],com_tableboss/Itemid,25/ where users can enter their above generated code and schedule a time and date. Dates available to schedule should appear according to the "product availability" discussed in #1. Bidders should have adequate knowledge of Joomla and preferrably Virtuemart.