First of all, students can't live by themselves completely. They ask their parents for money. Once their money runs out, they have to turn to their parents for help. Therefore, saving money is necessary. Besides, saving money is generally regarded as a good habit, which enables people to do whatever we want at any time instead of borrowing money from others.
With two advantages of saving money, you may agree with me that saving money is the best choice.
People want a system, the subject is unique, and there are two subjects, us and students. What you want to express is our students, but it doesn't make sense in English: we students can't help living entirely by our lives. So delete the sentence we have become: students can't live entirely on their own. At this time, students belong to the third person, while ours is the first person, so we should change it. When writing support opinions, J should try to avoid you, your, we, our, the first person and the second person. It is best to express its objectivity in the third person or passive voice. If you use the first person or the second person, it will be too subjective