The technology to build a rocket is as old as the technology to build a car. People build cars in their garage. Why don’t people build rockets in their garage? Why haven’t home hobbyists shot so many rockets to Mars that N.A.S.A. has to dodge them? If you have the tools and the know-how to build a car, build a rocket. Make your moonshot. Make your place on the face of the red planet. Make something. That is all.