Re: Where's the money?
"Profitable? It most certainly has the same mineral resources Earth has,"
Exactly my point. The same stuff as we have here does not cover the cost of going to Mars for it.
"so if there is enough water,"
Which remains to be seen.
"Mars could be easily self-sustaining."
Possibly, yes. But you're missing the point: colonizing Mars would take a huge investment with near-zero returns. Granted, the spinoff in the form of developed technology will indirectly benefit us all. But that's not the way investors and taxpayers like to see their money being spent.
"It's not a "get rich fast" place, but then again America wasn't either: It was a place of opportunities and potential freedom."
And enough people could afford to get there, paying for the trip out of their own pockets. Let me see you do that on a trip to Mars.
"Besides, don't mix up biological colonization and Colonization as in pith helmets and rifles. There was no real profit in settling in the sub-arctic frozen wastes where nothing grows, scraping a harsh life from hunting and fishing. Yet, humans did it. Living in or near the big deserts isn't fun either, yet humans did it too."
Because they pretty much had to. So yes, when things become so crowded here that we'll have to spill over Mars, we'll re-evaluate.
So it doesn't matter if Mars will never be the green seashore paradise one would dream of, it remains a place where humans can potentially live. Life will be difficult, but not more difficult than life was back then for those people who colonized inhospitable regions of Earth.