Yes, you can get back and forth from Xiamen to Quanzhou every day, for the two cities are close to each other. It needs only a bit more than one hour by bus. To rent a car, the price varies according to the types of vehicles. You need to pay 300-500 a day (8 hours), you need also to pay about 150 per day for the driver. Sheraton Hotel is in the new business center of Ximen and it is not near from the city center.