Content Writing for Website

We are a web design company and recently secured 20 new removal websites. We need content writing service for a house removals website. It needs to have a professional tone of a well established business along with the touch of SEO so our search engine marketing campaigns are complimented by search engines.

There are 20 sites for which we need to write contents for our clients. There are going to be 5 pages for each website. Each page should have at least 500 - 700 words.

The structure will be something like:
Homepage
House Removals
Office Removals
International Removals
Storage Service

Every page for each website and overall needs to be with unique contents. There are approximately 100 pages to write. We need price for each page if we choose to give the whole project and a price if we go on pay per page basis.

There will be 5 milestones, each delivering the content of 4 websites. Payments will be made in 5 chunks after each milestone is complete.