I graduated after graduation. You can also take the postgraduate entrance examination. If you don't want to rent a house, you can live in the dormitory of the school. There are many students living off campus, so they rent out their dormitory beds for less than a month in 200 yuan.
If you are demoted, it will do you no good, only harm. Nine times out of ten, you won't get into the postgraduate entrance examination. And if you pass the exam normally, you have a good chance of getting in.
In addition, if you need living expenses, you can do some part-time jobs in your spare time (not the kind that takes a long time, such as tutoring junior high school students and senior high school students, and you don't have time to do it every weekend)