Online Store - Shopping Cart Setup / Client Portal for File Upload/Download

Hello Freelancers! I own a small audio recording studio in San Diego and I'm looking to: 1. Create an Online Shopping Cart so clients can select the services they need and send payment. I have already purchased a RapidSSL certificate through my web host (Hostgator) and need this configured with the shopping cart. Shopping Cart must calculate 10%, 20%, and 25% discounts based on quantity of songs submitted. 2. Setup a Client Portal to my Wordpress website using Gravity Forms (already installed and licensed on website). Clients must have the ability to login to their own account and manage their uploaded WAV and MP3 formatted audio files. There should be fields for each audio file where the client can enter the name of the song and a notes field. I need to be able to upload the finished product (.WAV) to their account. I would like the system to automatically email the client, notifying them when I upload the finished product to their account. 3. Link all Shopping Cart transactions with my Freshbooks account for easy bookkeeping. I need someone who is proficient with: - Wordpress Gravity Forms 1.6.7 (can upgrade if necessary) S2Member S2Member Secure File Uploader - Shopping Cart setup - Client Portal / Client Login setup - Freshbooks - Has a detailed eye for style and design If you have some examples of your past projects would be great.