Hi,
I have good experience in arch. visualizations. Please find testimonials, and work samples, of mine, on my profile. What I can offer is a complete clip, of your scenario. In addition to that I can match the background voice to the animation, use music, transitions and so on. Please note that my offer do not include the actual creation of the background voice. The music will be free, or not expensive.
If that suits your needs, I wold gladly work with you.