Magento Custom Module Development

Hi Everyone, We need highly skilled Magento Developer to implement two functionalities on our magento store www.fashionstockexchange.com. Basically we have two categories on our store - 1) Buy-Exchange 2) Rent an Attire 1) 1st Requirement is under Buy-Exchange Whenever a user is buying some cloth under this category he/she will get an option on checkout page to exchange clothes on the checkout page purchased from us in the past under Buy-Exchange category only. The number of clothes that can be exchanged should exactly match the number of products in cart for purchase. For example if user has added 2 products in the cart then only two clothes from the previous order can be selected for exchange. When we get a new order we should get intimated on the admin panel if it is mapped to some previous order for Exchange or not. Also user should see a tab in his account of the products that he has exchanged and the amount that he has recieved for the exchange. Under Orders tab in customer account he should see his products bought under buy exchange category only. 2) 2nd Requirment is under Rent an Attire With Every product we add in this category, we should be able to add refundable security deposit money required also. This should show on product UI separatly. But should get added in the total amount. Please refer to [login to view URL] to see how it should see on UI. Also buy exchange functionality should not work in this case. There should be a tab in customer account section in which he cas see all the rented products till date. Please First Elaborate the approach that you will follow to implement these two functionalities. If we found it the best we will assign it you,