What are the ways to immigrate to the United States and how much does it cost? (a way to ask for a low budget)

You are in the same situation as a rich second generation colleague. We used to eat together every day, and then she told all kinds of people that she wanted to immigrate. Then she moved it. Of course, the money for immigrants is given by parents. At that time, she also said that unlike taking too much money from her parents, because he had a background in studying abroad and a good education, the immigration was relatively smooth. He found that the immigration company seemed to be Jinqiao. Anyway, it is on the side of the National People's Congress. At that time, the subway was all clear. That company is ok.