Hi Lauren,
I am a building designer located in Sydney and can help out with your design. I have Autodesk Revit certification and would use this primarily to design the site for the photo montage.
I am also a member of the Green Building Council of Australian and recently completed the Autodesk building performance analysis certification program.
From your end do you have any concept sketches or site plans to be used for the construct of your site?
Please feel free to message me to discuss your project further, I would like the opportunity to be involved with you project, I myself will be undertaking something similar in the very near future.
Thanks and regards
Steve