High Quality Blog Posts Needed

I require a total of 30 quality blog posts writing in as short a time as possible.

I have three clients who require 10 posts each - I will provide specific titles for each blog post and each blog would need to be laid out in a specific manner, as detailed below;

Title
Short, punchy description of blog (15-20 words max)
Main blog content at least 400 words, split up with three or four subheadings.

Although these blogs are for specific clients in niche markets they must not mention the client at all or be promotional in nature, I am simply looking for a compelling, informational piece.

Please specify within your bid your proposed cost for all 30 blog posts as well as your timescale for completion.