Ok, I can usually get the kernel of why in my dreams but this one has me baffled:
I purchased a beautiful house, a very expensive house, on a hill? bluff? cliff? overlooking the ocean. It was gorgeous inside, and the view was spectacular, but the couple who built it were insane. They put a pump in the ocean to pipe water into the house. WTF? Not only is the water undrinkable, it made me stink when I took a shower at my new house, and every four hours at low tide there WAS NO WATER! Right before I woke up, I was proposing to my boyfriend that we switch over to using rainwater collected from the gutter downspouts into a big water tank because this was so totally unworkable.
Now, I have no clue what a dream house with seawater in the plumbing means.