What's the crew size of this mission? 3 or 4? (Unless its not decided yet)
Probably only three for the ISS milk-run. Iron Hill is designed for a crew of five. The A-Crew is currently down to three (Mojoey and Lydia dropped out), and the B-Crew is still at five (though I've had no word from Rtyh-12, Tacolev, or Sam Edwards in some time). Add an MCC team of 3 (Sorindafabico, Indy91, Astrosammy) and the entire IHP team comes to eleven. The current system in which we post states on the board, is ugly, but it does work. I can't see DropBox as being anything but an improvement on that.
And *if* we are going for realism, we should try a capsule at least.
I agree--sort of. A Soyuz (or a SpaceX rocket

) would do fine for this mission. But if we were going for strict, and I mean
strict, realism, then IHP wouldn't have happened at all, because humanity does not currently have the money, and only barely has the technology, for a manned interplanetary mission. Oh, don't get me wrong, I'm no pessimist--a manned landing on Mars is coming, and very soon.
But I think that by the time we can do manned missions to the planets, we will probably have SSTO technology. I'm particularly proud of the efforts of Burt Rutan, Richard Branson, and SpaceX. I'm pretty sure they'll build an SSTO vehicle before any government does.
So we are going for realism, tempered by simplicity and the need to keep our options open.