In states where such data was available, transactional data was also factored into the equation.

If you really want to test your local mentors, ask them how many of them have been certified by a state board to teach real estate investing?

I realize that there is a fairly wide range of work a PM could do for an investor, but I am just looking for a general data. 

I'm about to get my NJ license (passed the test, interviewing brokers now) so maybe I can help you out.  

But not really a big deal once I lease up the property and it establishes a track record, at a 10 cap, it could be worth $500-$650k.I closed a SFH giving the Seller a check for $5k and paying all the unpaid taxes and closing costs totaling about $13k for a real sales price of $23k, but again the sales data shows only $5k which really kills the comps in the area with houses priced from $50k (REO's) to $250k and most of the similar houses asking $150-250k.

The tax payer service center website does not have it and the DC Open Data GIS system does not have it correlated with SSL or address in any of their databases.

You may not "legally" need to take care of the water issue but you could end up in my situation.Tenant gets a mold test done and finds mold in the air. 

10 Acres off 93 south Wikieup © craigslist - Map data © OpenStreetMap(google map)0BR available nowland 10 beautiful acres to get away from it all.

Cut out 75% of copy, eliminate all the "I" stuff.It's all about them, not about you.Then test. 

This strategy should also protect the downside a little better by offering a larger pool of buyers in the future.The way we try to claw back the cahsflow/equity is by targeting short sales or wholesale deals that may require rehab but are priced well below market value.We are not reinventing the wheel, simply implementing a tried and tested method.