In 1908, King moved his family to the growing regional city of Omaha, Nebraska. To crown his success, he commissioned a three-story, 14-room Victorian mansion in central Omaha at 3202 Woolworth Avenue. The mansion was noted for its ornate ballroom, in which Charles and Martha entertained many guests. King managed the Omaha Wool and Storage Company in the city. Leslie, and perhaps his other son, went into business with him as wool traders. King's wealth was estimated to have been up to $20 million. According to his granddaughter, King was known as the wealthiest man in Wyoming.