There is a gas station walking west from the entrance of the campus hospital. There is an E-Inn across the wall to the west of the gas station. It is very cheap. The student price for a double bed room is 30 per day. The conditions are not bad. There is a broadband computer, a public washroom and toilet; it is better.
If you want, just go to the Tiantian Business Hotel at the entrance of West Campus, but it is a bit more expensive. I don’t know the exact price, but it’s probably around 60.