Fix bugs on a custom coded website + Make it responsive + Improve Checkout page

This project is on a time sensitive basis. Cost plus time will choose the winner. This site is built on custom PHP. There's a map feature as part of the checkout page for clients to choose a location to pick up the product. With that being said: -We need to increase the site speed -Make the entire site mobile friendly AND responsive. Currently, the site does NOT appear correctly on Mobile. -We also need to install SSL, and make the entire site run on SSL. We have a SSL certificate in hand. -We also need to redesign checkout page to make it easier to place the order, especially from the mobile standpoint. There's a few bugs on the site that needs to be fixed: 1) The order numbers need to be changed to 6 digits long. Currently, order number show up as #1, #2, etc. The order number, customer name and information should also be shown on the [login to view URL] payment receipt. 2) The [login to view URL] receipt shows a field "description" which need to change. 3) The backend system is not properly connecting with the database to put in order updates (status updates). It also does not show what the customer ordered under the customer name. It was working before but not sure what happen. Could be as simple as database needs to be reconnected to the backend system. When you click on the customer's name, it should show the order details, and you should be able to update the order status from that point forward. Was working before. 4) The system currently emails customers a PDF receipt, and we need to edit a few lines on that PDF receipt, along with the contents of that email. We also need to test and make sure all PDF receipts are being emailed. We need to ensure ALL points are completed here. Please do not bid if you plan on missing a single point on the above list. Thank you.