Credit unions can be a good source to explore.

Hey everyone, There are various ways to analyze a specific property and there are ways to individualize different elements of Market and Neighborhood data. 

I have spent the last 20 years living in Los Angeles and NYC, but am interested in exploring a much more diverse list of potential cities for "early retirement" (i.e. a place to live when I no longer require traditional employment). 

I would talk to a lawyer and explore the options. 

They are all examples of data disintermediation, giving consumers access to data only the intermediaries had access to.

I’d also look at rental sites and see what comparable properties are renting at to get another data point.  

Or is there some kind of data gathering companies I could try?

I did, however, eventually evict the tenant for non-payment....so much for all the "extra" income.You could also explore switching to collecting 1/2 the rent every other week to accommodate the tenants poor money management habits.

Make sure you have conservative assumptions supported by market data. 

Not sure what data the trulia crime map is based on but there are other websites that provide detailed crime statistics of a given area. city-data is one of them.