Owning an NFL team is one of the most valuable and profitable businesses in the entire world. The valuation price of each franchise consistently increases annually, and the rich owners of these teams continue to get richer.The Denver Broncos are currently up for sale during the 2022 NFL offseason. They are reportedly expected to be purchased by Rob Walton, the heir to Walmart, for a massive $4.5 billion, the most expensive sports team sale of all time.If the sale were to become finalized in the coming weeks or months, Walton would become the richest owner in the league by far. His estimated $59.6 billion net worth would be more than the top five current richest owners' net worth combined. Here are the five richest NFL owners, according to Forbes.Richest NFL owners in 2022#5 - Stephen Ross, Miami Dolphins - $8.2 billionMiami Dolphins owner Stephen RossStephen Ross purchased a 50 percent ownership stake in the Miami Dolphins in 2008, followed by an additional 45 percent a year later in 2009. This means that Ross owns 95 percent of the Dolphins franchise, including their Hard Rock Stadium.Ian Rapoport@RapSheetFrom NFL Now: A behind the scenes look at why #Dolphins owner Stephen Ross fired coach Brian Flores.891129From NFL Now: A behind the scenes look at why #Dolphins owner Stephen Ross fired coach Brian Flores. https://t.co/GxXvxJtLLtRoss generated the majority of his wealth through real estate development by founding his own company, The Related Companies. He also founded RSE Ventures, an investment firm, and Kangaroo Media, which produces Fan Vision.#4 - Robert Kraft, New England Patriots - $8.3 billionNew England Patriots owner Robert KraftRobert Kraft earned his early wealth when he purchased the Rand-Whitney Group, a packaging company, and then founded International Forest Products, a paper-goods distributor. He combined the two businesses, a huge success, and started The Kraft Group to invest in many others.Kraft is now the owner of the New England Patriots in the NFL, as well as other sports franchises in the Boston area. He founded the New England Revolution MLS team and the Boston Uprising Esports team.