The phrase "dollar empire" refers to a situation where a person or a company has gained a lot of wealth and power by making or selling goods and services that cost one dollar. Full definition
What does it take to create a multi-million dollar empire, is it luck, is it finding the right market? (inc.com)
The company turned its primary product — a basic commodity and one of the most ubiquitous beverages in the world — into a multi-billion dollar empire. (inc.com)
Trump loves real estate and has used it as a platform for building a multibillion dollar empire that now spans many industries. (inc.com)