Zillow and Trulia can provide some good metrics, as well.For rental vs. owner-occupied rates, I'm not familiar with any systems that can give you that data with a high degree of accuracy; however, you might be able to get a pretty good idea by looking at zoning maps for areas you are interested in.

And visit at least a 100-150 houses/properties for sale AND for rent, in the given area, and understand values well and become intimately familiar with property values so you can sort of predict sales and or rent amounts of current listings with reasonable accuracy.

Accuracy of bid list5.

It's a long report but I think this summarizes it.Using a statistical analysis the results are the following:Zillow’s Average Percent Error: 6.14%Study Accuracy: +/- 0.86%Median: 6.70%Standard Deviation: 8.45%As evident by first glance (plus the large standard deviation) the only clear trend is that Zillow generally underestimates the value of the home.

And yes, I know, I have heard it many times "no one can predict that with a formula and accuracy".... well guess what, I can, do, and have within a margin of error of less than 3%.

I make no claims, promises or guarantees about the accuracy, completeness, or adequacy of the information.

The problem is you don't know which accuracy you're getting with any particular property.You can also do a rent survey, which involves calling other rentals off craigslist or whatever is the dominant source in your area.

My biggest concern if I were you would be the accuracy of the rehab estimate ($100K) and the accuracy of the resale value ($400K).

People have always questioned the reliability of appraisals but these intermediate boards and the use of out of area appraisals has not only increased the costs about 50% but also have raised doubts about the accuracy.

Because of what we do, we are liable for the accuracy of what we do say, so we know it is correct or we do not put it to paper or speech.