As a real estate investor, let me say this is fantastic. The only suggestion I have is to include more demographic information. I usually need a lot more detail about the neighbourhood (ethnicity, income, profession, married %, pop by age group, etc). Are you familiar with zipskinny.Com? They do a great job at the demographics.

Edit: looks like zipskinny is down, but here's an image of what their chart looked like: http://www.bobguskind.com/wp-content/uploads/2008/10/zip-ski...