Thank you! Texturing is indeed the hardest part of the job, I tried creating a Kefalonia's runway, modelling was very easy, texturing, it is certainly beyond me how developers like FSDG do it so well!
Blender is very easy to use, a few Youtube videos and you really can get to understand it quickly. Plus, unlike expensive programs like 3DSMAX, its free! UV Mapping seems to be quite a clever function in Blender and have not had any issues with it.
Getting the pictures for the hanger... I used Google 3D imagery to understand how the hangar looked, along with some images from google. In order to texture it, I signed up for Adobe Stock where I found some things such as the corrugated cladding for the hanger.
I would love to design an airport but doing it without visiting it and relying on google makes it very difficult!