No. No, they can't.
I think it's entirely possible that business interests will drive us to pursue asteroid mining before we visit Mars. Musk might change his mind.
FAKE NEWS
Mars One can get there for $6 billion plus $4 billion for every additional time they go and besides it will be paid for by Reality TV and Baz Lansdorff totally didn't pull all that out of his ass.
It saddens me that they no longer have autographed posters for $100 but not as much as it saddens me that they haven't ever shown up on eBay because $25 is still a little steep for a joke.
'cuz Curiosity cost $2.5 billion. And it's just a VW Beetle with a bunch of science bolted on.