Certainty is currency. 

I'm currently a software engineer at Snapchat working on embedded systems and I also am a partner w/ some friends at a crypto fund doing ICO investing. 

And yes, there is a lot of paid top-10 garbage on the internet that has been put forth by various gold or cryptocurrency dealers. 

Personally, I started with general REI investing books which led to the following paths: rental property ownership, landlording, types of RE financing, understanding micro/macro economics, understanding currency etc.  

To top it off, you have a currency exchange risk.

The currency exchange rots right now. 

Currency conversion dynamics can be a huge factor in foreign investment, one I had largely overlooked.Yes, that exchange rate does takes a big bite, but that's possibly where owner financing could be beneficial.

You have to find out what the sellers currency is in negotiations to make the deal work for them.If it is not something you are willing to do maybe propose a different scenario the seller hasn't thought of or considered.

However, there are many other things to consider when taking money into a new country.I personally have considered most of the bigger cities in europe and have found that the main thing to consider is the currency of the target area versus where you are.As an example, norways economy is largely driven by oil and with todays oilprices the currency here is very weak.

The thing is nowadays it is possible to have one "real" (brazilian currency) with a quarter dollar!!