I am a full-time professional freelance writer, with a college-trained background in journalism writing and editing. I also have sales experience. I have written extensively for search engine optimization and keyword usage. I would be able to provide you with these 25 articles within 5 business days, at a rate of $5.00 per article (assuming a word count of 500). Should you require a further 25 articles, I would be happy to continue to work with you on this project. Thank you.