Polling website - E-commerce website

Polling website
I would like a polling based website developed which is around eight page (home, contacts, questions, sign up, polling, graph, forums, poll summary). Home page has a flash header, and each webpage has the option for two advertising banners.
A user creates an account using email and password. Simple details are then gathered like name, username, nationality, sex and age. A terms and conditions box is ticked, and then the user has an account. The user can then create their own polls which they are reasonable for managing. A master user has overall administrative privileges.
Each poll has several levels of entry i.e.(media, film, sci-fi, horror, British, actors, top 100). Each level is entered using a drop down menu system which is populated by the user(s) (this is to reduce repetition). The question which is asked also has a drop down menu as the answers, and is also populated by the users taking part in the poll. Each poll has an area where people leave feedback.
Each poll is continues, but a summary (snapshot) is taken once a year, and includes a breakdown in percentages, maybe graphs. The top 100 most popular polls are to be displayed a separate page of that year.
The polling site should have Facebok and Twitter integration.

E-Commerce
I see the e-commerce website as a relatively simple website, and use much of the same technology that would be developed in the polling site. The integration in the two sites are in the form of embedded polls.
I would like an e-commerce based website developed which has is around fifteen pages (home, contacts, questions, sign up, voting, graph, forums, list pages, technology pages). Home page has a flash header, and each webpage has the option for two advertising banners. The home page also has a text area which can be updated by me.
A user creates an account using email and password. Simple details are then gathered like name, username, nationality, sex and age. A terms and conditions box is ticked, and then the user has an account. The user is then given an option to create an account with polling website. It will be explained that in order to create embedded polling, you need a polling website account, however it is not mandatory, and the user can continue without doing do. A master user has overall administrative privileges.
The e-commerce site sells only three products (different forms of carbon credits). Several types of currency would be accepted. When a person/company purchases carbon credits, their ID or logo is placed in one of the three corresponding list pages. The list pages simple list the company/personal ID of who purchased, and how much carbon credits were purchased. The list pages are sorted in numerical order (money), so the company/person who purchased most carbon credits, always remain at the top of the list.
The embedded voting system: Any individual user can create a forum within the e-commerce website. They get the option to create a corresponding poll within the polling website. The poll created in the poll website would be embedded within the e-commerce website. The master user can also create and embed polls within the e-commerce website. (if this is back to front and needs to be an option in the polling site then that is fine)
The polling site should have Facebok and Twitter integration.

The quote is to be for both website, but provide a quote for each website separately. The sites are to be developed by the same company/person.

As a question, how difficult would it be to create a system within the polling system, where any website can embed polls that they have created in the polling website?