Yeah, that's a re-posting of the MarketWatch article here:
http://www.marketwatch.com/story/how-to-retire-early-2016-07-19Which itself is a recycling (at least partially) of a prior piece Ms. Coombes did on MMM. I suspect the rest of the article is recycled as well, making this article a combined collection of previous articles. Ms. Coombes has posted to the MMM Forum before seeking info/subjects for her articles.