Alter some Images , exterior around a house

I need to edit the exterior areas for 14 photos / 3d models. Attached as an example is one of the photos/3d renderings. (It is in low resolution now, but if you get the project awarded you will get the high res files of this and all the other houses.) The house in itself is the way it should be. But the area around is not. I need it to look more real! Ocean need to be bluer, more alive. The sand need to look more real same with the grass and the bushes. Ideally it is pretty much a real photogprahy with the 3D rendered house in it Attached is a few images from other houses that shows the look and feel I want for the ocean and beach. Also attached is a screenshot from google earth to show you how it is in real life, and there is a little sketch to explain how I want it. What is very important to note is that it can NOT be exactly like real life in regards to the distance down to the ocean (ref screenshot from google earth). Then the house would be to small. However, in the image of the house / the 3d rendering it is to short of a distance down to the water. It need to be more sand, so there is just a line of water at the end of the picture. Just to show that there is water there. Please give me an offer. If you like to create one demo based on this first project, with the low res images, that is brilliant. Then I can see how good you are. If you want to do that, write it in your proposal and I will contact you. All the project will be pretty much the same. But three of them are not on the beach.