By Riley Gutiérrez McDermid This may be as close to the Dutton Ranch as you’re going to get. Looking for a legacy property that can rival Kevin Costner’s hit show? Then this mega-ranch near Sun Valley might fit the bill. With seven bathrooms and four bedrooms, a theater, chef’s kitchen, multi-car garage and a dozen acres, the property is located right in the middle of Blaine County — home to some of the best skiing in the world at the Sun Valley resort. It also has a gym, wine storage, wet bar, steam showers and, of course, a valley-overlooking massive front entryway. Why Idaho and Why Now?Ida…