The plt transported a load of skydivers to alt & was returning to the airstrip. During arrival, he decided to practice a simulated eng out landing. While on an apch with full flaps, the plt elected to slip the acft. As he was transitioning from a side slip to a normal landing attitude, the acft suddenly dropped, landed hard & bounced. The plt reported that on the 2nd touchdown, the nosewheel hub failed, the prop struck the rwy & the nose gear was bent.