Multi store seller Framework based on Opencart

About my project I want a site like [login to view URL] / shopify that people can make a free webstore easy based on opencart. First every store need to be isolated and that every store owner have their own opencart admin panel. The need to register on our site like [login to view URL] (so email/name/etc or with google or facebook.) and them they have their own store it need to be very easy for them. You need to make a extension for opencart that's make every store isolated/seperate. People can register on our page to make their own webshop for free. The admin (I am) can see every store and manage them. It's about a monthly payment system other wise the store is locked and if they don't pay in a month the store is deleting automaticly. Every on can register on our website to make their own store You have three packages 1. forever free and can change some templates that are in de server. Store link is [login to view URL][yourstorename]. No custom Css. Max product 25 Max sells every month 10 sales No coupon codes In the footer says our company name So we promote that every own can create a free webstore [login to view URL] you have package 2, a store they can add now a custom domain name [login to view URL] Max product 3000 SSL add 2 coupon codes Can add a own template And custom CSS 3. package Unlimted everything Every store haves a adminpanel the same as opencart gives The admin [I am] can add/delete manual stores normal it is going automaticlly People can manage their own stores. The style like [login to view URL] you can free register and check it out. I make a milestone of the total amount and release it at the end when we are both happy with our product. After that you give me the script. It is a big assignment, I am also looking for someone for a long term relationship