Article continues below advertisement$3.47 Million Nashville MansionSource: MEGAKeith Urban and Nicole Kidman have a $36 million real estate portfolio.Keith Urban and Nicole Kidman started investing in real estate together after their 2006 wedding.The now-estranged couple initially purchased a $2.4 million property in Franklin, Tenn., in 2007. They listed their first home in 2016 and officially sold it for $2.7 million two years later.After letting go of their starter house, Urban and Kidman acquired another Nashville property for $3.47 million in 2008, per Architectural Digest.