Carrington Farms, a 570-square-kilometer property on the New South Wales-Queensland border, comes with an impressive Macintire River frontage of 80 kilometers, enough grass for 30,000 sheep and sufficient water in its 29 reservoirs to grow 125,000 bales of cotton a year.

The spread has been a family business for 25 years. "This is simply a generational change," real estate agent David Wells said. "The owner wants to move on with other things in her life."