In my experiences, it really comes down to the tenants that create either a management headache or a super easy investment.

An easy flip at 7-10% return might be more lucrative than a larger project that takes longer and more chances for cost over runs. 

Just off the top of my head, I wouldn't feel super comfortable with non-US properties because properties in the US are held to HUD code (at a minimum).

Taxes are very high and everything is super slow and bureaucratic.

@Zach Howard the basics of the Rental Purchase Calculator is easy to understand and replicate.Google and you can find many similar spreadsheets for free.

It's not easy, as I said we dance the razors edge of profit and loss and last few years it's not been very profitable despite sizable growth. 

@Chris Mahoo many new investors don't take the time to properly understand RE investing.1) Many are using approaches from 2010-2018 when Class A property prices were so low from the Great RE Crash that an investor could cashflow and get pretty easy Class A tenants to manage.2) If you look at what investors were doing before 2008-2010, most were buying Class B & C rentals.To make it worth while, an investor either needs to Fix & Flip or invest & hold rentals for 10+ years.- Over a 10 year period cashflow will increase as rents increase (rents typically rise faster than property taxes, insurance, etc.)- The property should be appreciating, if purchased in a good location, increasing the owner's equity/wealth.- Rents will be paying the mortgage off, increasing the owner's equity/wealth.- If you hold a rental until death, you can pass it on with a stepped-up cost basis, limiting captial gains if then sold (limited by inheritance tax limitations).Too many newbies on this site trying to replace their day job income via "passive" real estate investing w/o digging deep enough to understand how it really works.

I’d love to hear about the crime rates or any other issues (which we cannot guess from the online stats), and how easy or hard it is to find reliable tenants and property management companies.

I detail here how my first flip essentially bankrupted me which resulted in this house losing money as well.It’s easy to blame others for all that went wrong.

@Unal Baris Kancoglu - if it is an easy switch out, probably $8k right now.