[Hunble]

I could not care less about any manned missions to Mars.

I want to know when we will have a robotic rover exploring this specific region of Mars!

How many robotic rovers could we have on this planet, for the cost of a single manned mission? Which would provide the most information?

[SunkenCiv]

The robotic missions would provide the most info, because none of the payload would be fuel for the return trip, food, water, medicine, bandaids...

Also, the robots can stay on the surface for years.

[Frank_Discussion]

"How many robotic rovers could we have on this planet, for the cost of a single manned mission?"

Several, undoubtedly.

"Which would provide the most information?"

The manned missions.