Well then the water should soak right into the concrete, it is much more porous than soil....
Are all those green things trees? If so that's about a million bucks right there. Our front tree died and we just got a replacement. It was like a grand and it's the size of a twig.
I see the backyard but I don't see the pool. It would be silly not to have a pool in OK since you are spending a lot of money anyway. Throw in another 60k.
Oh wait, is there an outdoor kitchen? Throw in 20 more.