Gonna tag Claude Greiner to see if I can get some input from him.
I can tell you by looking at the pictures your NOT going to get any Directv contracted installer to do this job.
#1 It's an apartment
#2 I don't see a place to ground the system
#3 it's an apartment
#4 The dish location where you want it mounted is a pain to get to.
#5 it's an apartment.
Call a local installer, he will get it installed for you.
It's nothing against you, I have scheduled these types of jobs for years in apartments. Rarely will they ever get installed.
Just for the fact It's an apartment 50% do not get installed, the other issues have to do with the installer passing an inspection.