what hotel (about $100/night) within five min walking to ticket terminal for Gulangyu?

Oh, you can easily find some nice and budget hotel nearby. Lang Qing Wan Hotel is a good choice. The price is CNY 200 to 300 per night. It's about 550 yards away from the dock. This hotel provides clean environment and kind service. The address is No.62, Zhenbang Road, Siming District.