Warren Buffett charges his son Howard Buffett rent to farm their family land, with the unique twist that the rent is based on Howard's weight. Howard, who manages 2000 acres in Nebraska and Illinois and is worth hundreds of millions, pays 26% of gross income if he weighs over 182.5 pounds and 22% if under. This approach is meant to promote health and financial discipline. Despite being a billionaire's heir, Howard works hard, having a background in construction and now fighting global food insecurity through his foundation. This strategy reflects Buffett's belief in earning wealth.