Help set up an e-commerce with with Magento

Hi, I am looking for a Magento expert to help set up an e-commerce site on Magento Go. I set up some of my products already but there are a few areas in which I need help, specifically: 1) Some graphic work to customize the site layout and design 2) Some customizations to the checkout process, specifically some changes to the workflow and fields and adding some custom text to the shopping cart and in the shipping and billing screens 3) Setup store to accept credit cards including keeping the credit card details on file for future transactions 4) Setting up cross-sell and up-sell products 5) A slightly different login with reduced prices for wholesale clients 6) Some customizations to the inventory management piece 7) Setup affiliate tracking and google analytics 8) Some SEO work 9) Ongoing support on an hourly basis for any additional changes or customizations I am not even sure that all of the above are possible on Magento Go. In your response, please itemize the expected number of hours/cost for each of the above line items, and please specify if there is anything that you don’t think is possible with Magento Go. Thanks