I don't know where your teaching place is (whether to concentrate everyone at home or rent a classroom at school, the latter involves rent). What can I say? Everything is difficult before it is easy!
The following are just my personal suggestions for your reference only! See if you can do it!
1. It doesn't have to take two hours. Personally, I think two hours a day is a little less! Maybe you will say that you should set aside time for students to study other subjects, so why give the opportunity to others? Yes, you can make up for two hours of math in the morning, plus one hour of "free" tutoring in other subjects! Of course, this is personal. You can let them bring their own subjects and teach them in that hour!
Now, the children are picked up by their parents after school. You can print some leaflets for parents to see, so that parents can take their children to listen for one day for free, with a lower charge in the first week, and then resume normal tuition.
Don't spend two hours in class just because you are making up math. You should give them time to relax and rest 15 minutes, and take them to play a game or something! In this way, the children will like you, just like the big brother or big sister next door! (Well, I talk too much ...)
4. The price, I initially set it as 100 yuan/person last week, and then I will return to 600 yuan/month. If there are only 10 students, your monthly income is 3000 yuan, which is not lower than your summer job!
Don't be too demanding. Take your time. The plan can be changed at any time! Be considerate! Come on!
Just a personal opinion, you can refer to it. I'm a college student, too. The dormitory is going to turn off the lights. Let's just say it! Although not comprehensive!