Apart from the website your suggested, I am currently subcribe to database Ebscohost and EmeraldInsight, both offer broad range of full text and bibliographic databases designed for research. I believe this would add more value to your database and also help you to find 3 cities (in MSAs with population of a minimum of one million) that have zip codes with a high number of low-priced SFR (inventory), and have a high number of buyers (demand). With additional database, more representative view can be form and more accurate decision can be made. I will be using both database (both cost at annual subcription of $5,000) if selected for this project. Thus, I am looking forward to be selected by you for this project.