I will bet he also practiced a very wise smart business protocol very few practice anymore. Self minimalism, rather than spend far too much on his self, he invested all that he did not absolutely need back into the business.
There was another man who did the same and because of this self minimalism grew the company to be huge.
Sam Walton...
https://arungreesma.weebly.com/uploads/1/7/2/6/17268232/sam_walton-made_in_america.pdf
The Walton family are the wealthiest people in five US states.