The cost of living in Kobe is ok, not as high as that in Tokyo, and the rent of 30 thousand to 50 thousand a month is enough. It would be cheaper if you could rent a dormitory at school. The hourly wage for work is about 850 yen per hour. It takes about 10 minutes by tram from Mimiya, Kobe, and about 20 minutes to Mei Tian, Osaka, so it's easy to find a job, and it's not far from work, so it's a very convenient place.
If you work, you will definitely be self-sufficient in living expenses every month. Too much, there will still be some balance. If your family can afford your tuition, I don't think you need to worry about living expenses, and you can have a good life in Kobe.