Is it a dream to immigrate to Mars?

As early as more than a century ago, in science fiction, human beings have began to walk on Mars, yet even today this is just an idea. But many people are convinced that the problem is not that humanity can not board the Mars, but in what way and when to get there. So far, still no one really knows what is the most convenient and easiest way to reach Mars. It is estimated that the human landing on Mars needs 60 billion U.S. dollars’ funds, or even more. However, the Mars Society President Robert • Zubrin said that this figure should be 30-40 billion U.S. dollars, equivalent to the cost of the Apollo moon program. Zubrin has published a book entitled "migration on Mars" The book outlines the blueprint of human settlement on Mars.
Why humans have always been full of longing on Mars? Because according to the observations on the current situation, Mars is most likely to become a second home for human beings. Although the temperature on Mars is about minus 60 ℃, but in all the planets of the solar system, Mars's environment is most similar to Earth's. The diameter of Mars is about half of the Earth, where there is also the gravity equivalent of one-third of Earth's and atmospheric concentrations of 1%. Most importantly, the detectors have found that water exists below the Martian poles and surface. Once every two years, Mars will be close to the Earth once, this summer, Mars came to the 55.76 million kilometers away from Earth which is closeat place to earth for sixty thousand years