i would get a concrete to make walls the will be 3 walls they will be 20 by 20 each block would be 8-in in Hight 8depth and 16 in width so there will 21 block going w ide for every wall and 42 block tall so for both have 20 feet so there will be 189 blocks need it to make the wall and we have to get transportation will be a mid duty truck in the back it will carry 2 tons of the blocks so i have to go 1 time because it will carry 5,292lbs or 2tons and a half the track can hold 16k pound or 8 tons and we need to get workers and supplies so it will cost