Went and looked at a great house... total turd in a nice neighborhood... 

They can even give you more detailed information for each neighborhood and how long properties are staying on market for each.

Don't buy in the roughest neighborhood in the urban core.

B building I was interested in local neighborhoods and some local advice on investing in the area. 

(age of home, neighborhood, size of home, lot size, quality of finishes, etc.)

I just sold a duplex for less than $150k in a the Fresno High Neighborhood, an A- neighborhood.  

In my experience, most agents aren't going to be helpful here (some exceptions).You can ballpark these things after getting some data:Rent:  use the sites  you think you're future tenant will use to find you as a landlord (Zillow, Rent.com, a big property manager in your area, Craigslist) and look for similar places in similar neighborhoods. 

I don't have 20% to put down on a $160,000 triplex or fourplex and the lower cost associated with townhomes is why I think it would be a better fit for me.

Is a 2000sqft house in this neighborhood worth a $500k after rehab?

House is mid 70’s along with the rest of the neighborhood. 2.