Here's a thought
Why not move the International Space Station to Mars orbit? From there real humans could remotely control robots on the surface, without the annoying 3 to 19 minute transmission delay.
It has the advantage of real time response, without the risks/cost of placing people on the surface.
It could be packed with supplies, and sent there courtesy of thrust provided by ion engines.
Much safer than landing people on the surface, and less costly/larger payloads, due to reduced fuel requirements.


