The local analysis is a good idea. As you indicated, getting information on credits for repairs, closing costs, etc is hard to do. However you can fudge a number in and keep it uniform for all of the properties you look at. Given the part of town you are in, MLS stuff would give you a pretty good swag as the number of non MLS sold homes tends to go down in higher median areas. You can ask any local realtor to dig for you and start sending you individual solds in your target area and you can start to compile ppsf numbers along with other statistics. You can even go to sdlookup and other sites to gather the information. I think other stats like market time, and whether each listing had previously been listed may be useful as well to get a measure of how motivated was the seller to price the home to sell.
