They did that with Spirit and Opportunity, which did cost a lot less. If money really were not an issue, I'm sure they'd like to send twin rovers again, and als

They did that with Spirit and Opportunity, which did cost a lot less. If money really were not an issue, I'm sure they'd like to send twin rovers again, and also pay for two rover teams, and for extra telecommunications capacity in the form of a dedicated orbiter[1] or two, and so on. [1] https://en.wikipedia.org/wiki/Mars_Telecommunications_Orbiter https://en.wikipedia.org/wiki/Mars_Telecommunications_Orbite...