We should have a continuously operating shuttle system between earth and moon, and earth and Mars if we want to get serious about this space thing. Regular operation like a city bus system. Would cost something to set up, but once operating it would save beaucoup bucks.
I know that one of our former astronauts has proposed the idea of a series 4 or 6 of unmanned ships that continually orbit between earth and mars. Sort of an interstellar bus line.