Battleland. limited selection According to Winslow Wheeler less performance $30 million range limited selection less performance one-ninth to one-fourth the payload $120 million research one-ninth to one-fourth the payload According to Winslow Wheeler expensive $20 million According to Winslow Wheeler $30 million range $120 million $30 million range $30 million range less performance $20 million $20 million $120 million limited selection According to Winslow Wheeler expensive $30 million range one-ninth to one-fourth the payload costs at least $5 million a year expensive