How much does it cost to visit all of the locations of the great wall?

The entrance fee of each section of the Great wall is CNY40-45, and there are over 20 sections in total. Thus, I think at most CNY1,000 are enough for the entrance fee. It will cost too much on the way, including the transport, dinning and accomodation, since most of the walls are located far away from the downtown area and the great wall are distributed in different cities. It's hard to calculate the total cost.