The pool was engineered after the design was finalized and a soil sample, with 2 bore holes to 20 feet, was completed. The foundational footers were recommended by the engineer because of the elevation changes and the soil samples. Originally we thought we would need around 20K - 40K worth of foundational piers but the engineer determined, after the soil sample, that the footer would do the job. We had a raised spa at our old house that had a step in it and we really enjoyed that option. We thought about another step outside, but decided against it. Time will tell if we need to add that, but that would be an easy add on.I just went through lots of your pictures and your pool looks quite elaborate. When they shot the shell, was that footings of sort throughout the center of the bottom? Looks like it would be very strong. Is that standard construction to thicken like that or is it due to the soil or something in your area? I also like that you have a step into the spa. Ours doesn't and I'm thinking it will be a little difficult to get in and out of, especially the older we get. Also would have liked a step from the outside. I can say the same for our tanning ledge. In my opinion, it should have had a step into it as well. Nice looking pool!