Well, that design is definitely out of the question, unless i decide to do a liner pool over concrete! When my PB started talking about retaining walls, etc. I didn't even want to hear a price to concrete that. I'm like 99% sure i want concrete with everything i've read on here and other places online about the cons of a liner pool. The problem i'm struggling with, is i'm the type of person that knows what i want, and most of the time if it's not exactly what i want, i'll just forget the whole idea (whatever that might be at the time) and move on to something else. I REALLY want a diving pool, but plenty of shallow end for the kids and wife. I think over the years as the kids get older they will really enjoy the diving end more and more like myself and i'm sure majority of you on here did when we were growing up! Another issue i'm coming up with though, is all the PBs quote 8' for the deep end, and i just don't feel like that's deep enough for a true diving area? I know they quote 8' because that's what they have to by code/law. I feel like it really needs to be closer to that 10' mark??? Problem with that, is that's a lot more money going from 8' to 10' AND my PB said it will greatly reduce the shallow end of the pool due to the amount of slope there would have to be in the pool. My quotes right now are for 20 x 40 freeform concrete, 18 x 36 freeform concrete, 18 x 36 rectangle liner, and a 20 x 40 rectangle liner. The concrete quotes are just over 20K more vs the liner quotes. I just really don't like the idea of a liner pool from all the cons i've read online. We are dog people (have 2 or 3 at any given time) and it's going to be impossible to keep some of them out of the pool.