I have a 20x32 in ground steel wall which I would like to make it to a 20x40. I was thinking of doing it on cement block due to money savings. Also two of the walls are getting pushed in and it need completely new plumbing and electrical which is where I need some help. I seen a few cement block pools but nothing really helpful. I work construction on the side and a mechanic for a full time job. Any help would be nice