He has simply done this by living below his means. So different from the rest of the world. I say, "Good for him!"
Not only has he lived beneath his means, I'll bet he never complained about "only" making $11 per hour. The article said he always worked hard. He could have complained and spent all his money but he quietly saved and did his best. I don't know where this man is in his faith journey, but I do know that he is a great example to many.
Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is--His good, pleasing and perfect will. Romans 12:2