Too much!
Closer: There is Huanglongqing 7 kilometers behind the Golden Palace. You can have a meal, sing karaoke for a day, and have barbecue in the evening. 50 yuan is enough.
If you stay continuously, it may cost 80 to 100 yuan; in other places, such as the Nature Garden and other surrounding leisure parks, a meal and singing will cost more than 100 yuan.