570450 Opencart small custom mod needed 2

Need a small custom oprn cart module. How it would work:: 1>I would set a threshold stock limit(2,3 or 4 ) say 3 in admin panel. 2>When item stock will reach this number the status of stock would automatically get changed to "End of limit". 3>At this stage a buyer(all my buyers are registared account hold no guest checkout is allowed) would get an option to 'Reserve" the product along with normal add to cart option. 4>Once he clicks reserve he can set for how many days(and admin will get notification like new order notification),the stock will get reduced and reserved under his name. 5>He can see his rserved order details in his account page where all reserve order would getlisted. 6>Similarly in admin panel admin will also be able to see a list of orders which are reserved. 7>After specified days if the product is not purchased it will be automatically get canceled and stock would get restored and client would get email notification. You would develop it in your server and deliver us the code with instruction. Payment will be through escrow only and would be cleared after we install and test it in our site.I would also need you to be available in case of any bug found for sure. This is one of the three works I need done in Opencart [login to view URL] know if you can do it in 3 days and I will reserve the other three too for you.