This is a different mood for the last shot i liked but i guess that i will use the blue sky one for the final render.
The last thing I will do is adding some details and final retouched the i will put it into render.

once I have seen the building and the surroundings I realized on thing , that the main building and surrounding building colors are so similar which make the building a part of the environment whic is a good thing archticturaly but when it comes for taking a shot conentrating on the building this similarity makes a distraction for the eye.
this Idea that i have will effect my dessision taking the camera and which environment and mood should I use.

for camera i decided to take a vertical shot to reduce the ammount of buildings in the main shot (we can show them in different shots), also diveided the shot for two two pieces , the upper half fore the sky and the lower mostly for the floor and buildings .
the main building will be centered in the shot to give it all the focus ,also the contrast between the sky and floor will help on focuing on the main building.

for the environment I decided to use a clear morning sky ,tried to avoid cloudy sky , and that is because the rusty looking of the building and rough texture of the floor and surrounding buildings makes the scene very crowded , so I tried to make the scene little bit quite by using a clear sky.