How many stories are you talking?
I would try to contact Scott Z, or Tim V. They really seem to have the experience that can give you the correct answer.
I have done one high rise, but it was only 13 stories, and we put the control up from the ground, shooting through the open walls before the building was closed up. I worked for what we did, but I am told that method would not work for buildings that are much higher than that.
Good luck, I'll be watching this thread.