Build a CMS in CI

I want to build a Codeigniter CMS. The CMS will enable users to build their website from admin panel with complete functionality. In total I want the following. 1. A good looking website like a site from where we are going to sell the CMS syste. Site should include normal pages with the same desin (home, about us, contact, us), then a blog page where I will publish some blog posts, and it should be managable from my admin panel. and a payment page. My admin panel, it will include just three things text editor for blogs and pages, and uploading templates and uploading different forms. 3. if a user pay/ subscribe he will get username, password and will be able to enter into the admin panel. 4. So user admin panel will be able to manage things like a) logo, website header, title, a search function, add/edit page with text editor and page content will be saved into their particular database, a blog page, right sidebar, a company information, footer text, contact us form. All these things will be done by setting a variable for the view and when we call that variable from any template it will show up. (I am sure you know this in CI). As a example like wordpress echo get header for header or whatever I have forgotten. and the last thing is a form builder. make a form builder where user will be able to build there own forms with different fields and this form will create a database table at their database with the same field name and when a user submit this form it will be saved into database as well send site admin email. And when a user want to choose a template please let him play a demo in templates. I need to build this in two weeks and I am going to hire for $500 and $50 bonus in competition of the project. I will have numerous projects for the right agency/ contractor.