"Kevin Costner's $100M Passion Project: Putting His Money Where His Mouth Is" 

Kevin Costner mortgaged his California property to fund his passion project "Horizon: An American Saga."

The 10-acre property was used as collateral for a loan to partially finance the film series.

He has been working on "Horizon" since 1988 but struggled to find financing.

To make the films, he deferred his fees as a writer, producer, and actor.

Costner sees movies as powerful and believes in the longevity of storytelling.

The cast includes Sienna Miller, Sam Worthington, Luke Wilson, and Jamie Campbell Bower.

Costner previously self-funded films like "Dances with Wolves" and "The Postman."

"Dances with Wolves" won him two Academy Awards and critical acclaim.