Profitable Asteroid Mining

Mining platinum group metals from asteroids has long been a proposed method of making a profit from a space program. Until recently, however, such a proposition was non-economic. New technologies, particularly magsail propulsion and high efficiency solar cells, drastically change the situation. An asteroid mining operation with an initial revenue of ~2.6 billion dollars/year and an initial cost of ~5 billion dollars seems quite reasonable if such technologies are utilized.