@Henry Clark and @Mike Lambert - Good points, comprehensive analysis, and nice theoretical and paper exercise but I would like to share with you my practical experience of living and investing in Latin America and Europe.
Whenever you are investing overseas, you need to consider in your analysis 2 major risks: FX/currency and regulations. These are 2 elements that are new to the risk-reward equation in comparison to domestic investments.
Currency is a MAJOR risk. Rule of thumb, US dollar is still the strongest currency and during any economic crisis, foreign investors will seek investments in USD as hedge to the local Emerging Markets currencies. As example, most Emerging Markets currencies depreciated 25-35% vs USD in 2020. The investor might focus too much on foreign markets with attractive 7-10% cap rate and completely overlook the volatility of the currency.
Regulations: Europe tend to be way more regulated regarding real estate speculative market and stricter tax rules. @Joshua Flowers might remember that investing in real estate in Berlin in 2010-2012 brought AMAZING returns as of key European capitals was still very underpriced in comparison to peer cities. HOWEVER, there are a lot of different tax rules in short term and long-term capital gains.
REI in foreign countries require a LOT of due diligence, this is not for beginners…