I wonder if it is expensive to buy molds. After all, I'm not a student there, and I don't know anyone who specializes in this field to ask for you.
But the living expenses here are ok. If you save flowers, it's not too high.
Basically one month 1000 is enough.
If you can cook by yourself, the living expenses of 500 yuan a month should be enough. If cooking is not allowed in university dormitories, don't stop several people from sharing a room. Or rent a private house for two or three hundred dollars or something.
If you are interested in leaving your QQ, I will add you. If you come to Shanghai University in the future, you can come and visit me.