Yeap, that's the number I used
I was referring to the cheaper Mars Direct plan rather than NASA's more expensive reference mission. Still 20 years to Mars is better than 33 years to nowhere. While I would prefer 10 years, 20 does give robotic missions more time to pave the way and at least mute nuts like BD.
ISS funding will drop once it is complete buy the way so it's as simple as waiting rather than cutting. No hard choices, just hard waiting. However, I am fine with cutting ISS if it won't be run in a manner conducive to actually doing research.
Regards,
Mark