Those living in public housing are generally required to pay up to 30 percent of their household income as their share of the rent.

Ask for a copy of the city's master plan or comprehensive plan which will describe the 3-5 year goals for the area.

I have noticed a decrease in some of my sec 8 tenants rent but it was because one of the children/tenant on the lease with them has started working or makes more money than what was reported and that counts as income for the household.

Yes the total household income may only be $35,000/yr, but they can afford a $100,000 house.

citydata.com is a great resource to get an amazing array of information on demographics, employment, household size, commute times, bedrooms/unit, property type breakdown.. all census data and more.. 

Check back with me..I like the East Bay vs. inland where the GRM's are lower because there is no land to build any closer to SF and any other land is very expensive, tight rental market with increasing rents and prices, close commutes to major, growing employment centers, positive household formation, and being a special little place in the US and the world.

B- my tenant profile is all high end, so no biggie managing half a dozen well educated and well paid yuppies (I select a designated yuppie per household, so only deal with 1 person per unit.)

I am definitely still learning how to do the diligence necessary to call a deal "good", and I have also been wondering if software like this exists.Ideally, I'd love to have a tool that could be almost completely comprehensive: Comps (with photos), nearby rental details, craigslist searches, very rough calculations of things like CoC and NOI, etc..I know sites like Zillow give you some of this data, but it's obviously only one source.

I've read a few threads and blogs on here but couln't find anything comprehensive on the subject.

Ie zip codes, household income, age.