In 1989, two years after Una's death, the house and its  grounds were sold by the Walker heirs to Masao Nangaku of Minami Group (USA) Inc. for $8.5 million. His intention was to restore the original house to be used as a corporate retreat.
In 1989, two years after Una's death, the Walker family sold their home and grounds to Masao Nangaku of Minami Group (USA) Inc. for $8.5 million. He intended to renovate the house into a corporate retreat.