You can get someone (ok, some couple) in a can and on their way by 2018, the next near approach. The following near approach will be enough time in the future

You can get someone (ok, some couple) in a can and on their way by 2018, the next near approach. The following near approach will be enough time in the future to define a distinct mission, enough that current interests and abilities may no longer be capable (even multi-millionaires only live so long and/or retain mental capacity so long, or even possibly their money and influence), and enough time in the future that it will not provide the current boost and motivation that is intended. TL;DR: This is in part the "just fucking do it" approach to manned space exploration including travel. Some people argue that it / a return to it are long overdue.