Design Website Ebay Page Facebook

I would like an ecommerce website design and apply the same design to ebay, facebook, twitter, instagram, amazon, etc. I would like to pay for this project as a monthly fee as changes may require once a month or so. I would also like some SEO. I have already paid for the domain name and would like to use [login to view URL] because Im planning to use [login to view URL] to list all my items on ebay and the website. The website is going to sell fashion and name brand jewelry along with accessories and handbags. In the future we will also have houseware and electronics. Thank you