Wordpress plugin to create thousands of posts using article excerpts

I currently use a csv import Wordpress plugin to create thousands of doorway pages on my blogs. With it I import my keyword list (in text/csv format) and it creates one post for every keyword using a template I create in the plugin's settings page. What I would like is for you to adapt the existing plugin or write me a similar one from scratch, but instead of using the basic text template as the content of the post, I would like it to take random sentences from within a folder of articles and 'mash' them together to create the content of the post. So for example, it takes 5 sentences randomly and puts them together to make the first paragraph, then another 4 sentences to make the second paragraph and so on. Here are some more features I would like. If some of them don't make sense to you, because you think they might make the content unreadable, all I am trying to do is make the content unique from page to page. I don't care if it's unreadable; • The articles will be in spin-ready (spintax) format. The plugin will need to spin the sentence as it creates the post. Some sentences will have a [[keyword]] shortcode in it. I would like that shortcode replaced by the keyword for that page. • Random length of content and number paragraphs (with option in settings to control maximum length of either.) • Randomly add bullet points (use sentences as each bullet point) - with option in plugins settings page to determine how often it adds them and maximum number of bullets. • Keyword list will either be plain text list or csv file. • Need to be able to select which category the posts will be made in. • Back date posts so they're all dated in the past and not scheduled for future date. • Would like text boxes in settings page to be able to control what's entered in the post title, page title and tag fields. eg. for the page title - "This page is about 'keyword' and other things." • Random insertion of subheadings between paragraphs. Use random sentence as the subheading and capitalise it. Would like option in settings to bold or H1/H2 the subheading, as well as choosing how often to insert keyword into the subheading. • Option in settings to randomly insert image (from media folder) into the content whilst post is being created, as well as randomly resize that image. Ideally I'd like an option to generate images dynamically, but that's not imperative yet. • Boxes in settings to add content added to beginning, middle and end of post. Must also be able to use spintax. • Option to randomly bold, italicise strings of words. Would like to choose how often it does it and maximum number of words. • Option to randomly bold, italicise the keyword used in the post. Would like to choose how often it does this and the maximum number of times per page. • Ability to insert keyword randomly into post with option in settings to control density per page. • Option to randomise order of the words in a keyphrase to make it more unique. Need option to control how often it does it (e.g. 10% of posts and 0-2 times per page.) • Needs to be as fast as possible, without crashing the server! I realise some of these features might not make sense yet, but I just wanted to give an overview now so you can decide if you can complete the project before bidding. No crazy bids please. I'll ignore anything on or over the budget maximum of $250. I'm happy to send you the existing plugin if you would like to look it over. Code is for my exclusive use and must not be distributed in any way. Thanks