An independent report concluded that NASA has no chance of sending humans to Mars by 2033, with the earliest such a mission could be flown being the late 2030s.
Which doesnt surprise me at all, since I've been reading we are going to Mars from NASA since the early 90's with dates which were in the first decade of 2000, then the date being kicked foward everytime it approached, and since then, there were at least 17 Mars mission plans by NASA which never happened, having the first one a suggested launch date as early as 1971.
But SpaceX is a different story, since this is the first time they announce a date, and they've shown they can do things which werent done before, like a landable rocket. Yet, given NASA missions which never happened, and others bunch of Mars planned missions by other groups which never happened, one wonders of the feasibility of it.
Is there any independent evaluation/report on the feasibility of SpaceX going to Mars by 2024?