Mattress Mack, an American businessman, has a net worth of $300 million.
He is best known for owning and operating the Houston-area Gallery Furniture chain of stores.
With $5,000 of his savings, Mack launched Gallery Furniture in 1981 out of the back of his pickup truck. During these early months and years, the trade grew gradually but steadily; nevertheless, after the oil industry ran into financial difficulties, so did all retail establishments in Texas.

Jim invested his last $10,000 in 1983 in several regional television commercials. While filming one of these commercials, he got angry and started taking money out of his pocket, yelling, “Gallery Furniture saves you money!”
McIngvale ran into financial trouble and decided to put all of his remaining funds, about $10,000, into a television commercial that would air on two Houston stations. He grows impatient watching the advertisement being made and improvises a sales pitch, speaking quickly due to the short time available.