Hi. I am parametric designer, GIS-analyst and programmer. I can do this job for you.
My last project was simillar to you task. It was a series of sollutions to calculate different "costs" of construction like outcome areas for flats and commercial, sun exposure, foundation depends on topography, etc. I haven't published it yet, but you can find some of screenshots here [login to view URL]
Please find previous my works in my profile. Also in blog [login to view URL] you can find other my works and works of my team.
I will be glad to discuss details of your project
Best regards,
Alex