Merlingear website

We have an existing website : [login to view URL] . This is written in PRESTASHOP and has a wordpress blog. We require someone to assist with the ongoing maintenance of the site and to make any changes required. For example, we want someone to add a page that will allow us to upload Zip files to a hidden or secure page in order for our customers to be able to gain access to these files and download them. (We have a software program that we need to make available to our customers through this mechanism and want the download mechanism to be password protected). As we will be giving the selected freelancer access to the backend of our website and passwords to our SQL databases etc, we will require references to previous customers that we can contact (preferably Australian). So we are looking for an hourly rate for the ongoing maintenance of the website. For special projects like the add on page, we will ask for a fixed price quote to perform the task.