I have a scientific blog with extremely HQ content. I am consistently adding more HQ content and I am looking for a way to outsource my on-site SEO. I have a few questions: 1) Will a premium Yoast subscription be sufficient for configuring my site to be perfectly SEO optimized? 2) If not then what is a fair price for the service of providing on-site SEO and how do you suggest I approach it considering that I will be adding 4-6 articles per month and I will need those pages optimized as well. 3) Can anyone recommend an established reliable service or the best tool which can help me identify the best keywords for each article page based on the article content besides just using a Keyword Tool?