A Menards store in Wisconsin.Talia Lakritz/Business InsiderMenards home-improvement stores earned John Menard Jr. his $22.9 billion fortune.The Midwest chain is different from other stores, with mail-in rebates and no installation services.I was surprised by Menards' size and enormous selection.If you've spent any time in the Midwest, chances are the "Save big money at Menards" jingle is permanently embedded in your brain.Menards, the home-improvement chain founded by John Menard Jr., is known for its discounted prices, mail-in rebates, and quirky Midwestern charm.