I am looking to build a concrete above ground lap pool. It should be completely above ground. I came across a picture which I liked attaching the picture. I am also wondering why is that this type of concrete pool which is completely above ground is hardly seen anywhere. Do you know What should be the width of lap pool be, we have gap of 12 feet from fence to wall. Length I am thinking of keeping around 40 ft. Also Any idea how much would it cost to build a custom above ground concrete pool like this.