Both as a source of rehab funds and funds to use in other markets that are cheaper

@Milan Patel Take a look at My Rent Source.

I called both Secretaries of State and found out I would have to register with Ohio as a foreign LLC. 

They simply have less exterior attack surface to defend.Age and life of components: I sourced average useful life for a laundry list of components from InterNACHI and a few other sources to fill in, as well as my own professional experience. 

I source off-market parcels for some of the development work I do and have had the most success by just calling the owners.

Once you receive an application, run credit checks, background checks, research the information provided on the application, and take the time to contact each and every one of their references and previous landlords; it’s the best way to learn all you can about how they treat a property, directly from the source

I work with the 1-9 unit range so having 10 would fall outside my options and it would be harder for me to source/qualify my clients.

I work in pharmaceutical sales which affords me a decent pay and flexible schedule and I truly enjoy it so my properties will be passive income which will further support my family.My parents have a college rental at the University of Dayton which does very nice and I like the idea of that model as a fairly safe and reliable source of passive income.

My question is, what are some great sources to find more in depth information about certain locations/neighborhoods? 

Many are not foreigners at all.