It would probably be smarter to launch multiple payloads than have everything in one big payload, a fire can take out the primary and redundant supplies for example.
That said, throwing more money and gear against the problem will likely be the way to go. Besides, it doesn't actually have to be done all in one go, if the vision of SpaceX is that of mass production, they can launch a whole chain of Spaceship sized payloads towards Mars years before a human crew is sent that way, giving them supplies and whatnot on the way, in orbit, and on the surface. That'll require a lot of planning and automation though.
SpaceX has always mentioned sending multiple ships at once for redundancy, starting with uncrewed precursors sending supplies ahead of time.
This is irrelevant and completely ignores the OP. We've had rockets capable of going to Mars since the 60s. More rockets do not solve the problem. Cheaper rockets do not solve the problem. Please read the article.
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Please read my comment. More mass makes solving virtually every challenge of Mars missions far, far easier.
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