Let's say that there was no difference between deep space and the Earth's atmosphere. Let's say that there was no difference between the safety of the Earth's magnetoshpere and the radiation of deep space. Let's say that there was no difference between taking off and landing at an airport and gaining and losing escape velocity.

Then just take cost per mile, multiply it times the miles in a one way flight to Mars.

You can leave the cost one way, as with the suspected biohazard no one would want you coming back, and in any case there's also a good chance that Mars' 1/3 Earth gravity would kill you over a length of time.

As for the habilitability of the site of Las Vegas, amazingly enough, my memories of the watershed of the area seem to elude me right now, but you will note the Spanish name of the town.

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