High-quality article / blog post writer for content on multiple topics – long term

I need a writer with great English writing skills, who can research and write high-quality articles or blog posts on various topics. These articles and blog posts will be used for SEO purposes. This will be an ongoing and growing relationship as our client base grows… (Budget: $10 – $30 USD, Jobs: Article Writing, Blog, Content Writing, English (US), SEO)