http://www.mrmoneymustache.com/2017/05/19/2016-spending/
tl;dr - He is still very frugal, unless you count his business expenses. He definitely works on his business and brings in income, but he gives much of it away.
Also if you look at the post you linked "Does not include the $30k detached Studio I built." 30k$ is more than a LOT of people gross annually in the U.S. and he claims it doesn't count as an expense which conveniently keeps his budget 30k$ smaller than it in fact was.
According to the U.S Census Bureau "The per capita income for the overall population in 2008 was $26,964; for non-Hispanic Whites, it was $31,313; for Blacks, it was $18,406; for Asians, it was $30,292; and for Hispanics, it was $15,674." which are all less than his 30k$ "hey guys it doesn't count I added a whole new room to my house" creative budget.