There is no doubt that SpaceX as a concept sounds interesting, like everything Musk creates. Launch costs may be cheaper but this business is very expensive and his idea raises the uncertainty of whether it can be sustained over time. Inhabiting Mars sounds nice but is it feasible in the next 10 years....SpaceX will follow the course of most of Musk's ventures or will it be the exception....that's where the doubt arises. Regards and thanks for your support.