What to do...I imagine that as I gain experience and track accurate data on my portfolio this will allow for greater and greater accuracy in capex projections.

There are several services that will do it for you with various prices and level of accuracies "Intelius" is one but there are other such as "People Lookup" and "Zaba Search"Quick Google and you'll find their site.Good luck

You will have to eventually make a judgement call for what you feel makes most logical sense (and alot of times you'll rely on accuracy of your numbers aka financing of your rental to help you do this).

If you have any more suggestions on how to analyze these properties with more accuracy I am open to any and all suggestions.

These are certainly more challenging and also call into question the accuracy and believability of the information. 

I still use a standard reel tape measure - when it's a game played in half inches you need the accuracy.

I've found that I get 1 out of 25 numbers are incorrect, which is roughly 90% accuracy rate on a 1000-lead list.

Also, rent projections are within $50 of accuracy.

I know Zillow's metrics are not widely lauded for their accuracy.

If you are worried make sure you have written criteria that includes demeanor in person, quality of communication during the application process, completeness and accuracy of provided information.