Never a fan of these 'click bait' headlines, and surprised it made it this high in hacker news. We get the 'premise', Mr. Money Mustache has been preaching similar for years, but these numbers are just not realistic. You need money to buy the house, maintain it, clothes, healthcare, NY is going to jack your taxes up, etc. and more, as all the folks have mentioned here.
Can some folks live more frugally, for sure, but this is unrealistic.