How can you just go to northern Xinjiang! Although there are many good places in northern Xinjiang. Let me tell you about a road trip route we used to take in the north. Urumqi starts from Altay in the north, and of course, you said Cocoto Sea, and some places are included in it. Then from Altay to Karamay, Kanas, Yining, Nalati, Korla and Turpan to Urumqi. The advantage of this route is cool! But it takes a lot of time and money, and the road is dangerous, especially from Nalati to Korla. As for the place to live, there is nothing to worry about. There are not so many people in Xinjiang scenic spots, where there will be something to live, where to live in Cocoto Sea, and Nalati is very expensive. I don't recommend it. More than two weeks should be enough, but not very rich.