Indeed, non-EU purchasers only represent a few percent of the houses bought in the country and the properties they generally buy are not affordable properties so that tax wouldn't solve anything and would bring less capital and less jobs to Spain.

I agree with @Jonathan Greene that the question is vague, so my advice will have to be as well.The short answer: MTRs are real estate, so just like all real estate, any place that can long-term-rent cash flow with increasing jobs/population can be a suitable site to purchase. 

I have run them before but not my day job.

The husband had a good paying job that had a slow season where he would collect unemployment a few months per year.

I consider inventory rates, price trends, unemployment data, population growth, job growth all to be relevant to where a market is at and where a market is heading.

I’m returning to the U.S. after spending a few years overseas, and I’m eager to start my journey in real estate investing.Once I’m back, I have a job lined up with a wholesaling company where I’ll be focusing on buying houses.

Jobs.

This development, spanning nearly 6 square miles, promises to create thousands of jobs, generate economic activity, and transform the local economy.

BP has done such a great job of promoting SFR investing to the masses, that those masses have pushed up real estate prices to where it's now DIFFICULT to cashflow right away.Keep going, but understand you won't get rich in real estate overnight - it's a long-term wealth building strategy.For the short-term, recommend joining a few in-person investor meetings if possible, otherwise online ones.

A strong “Core 4” can make managing your investment remotely much smoother and prevent a lot of headaches.Also, as you narrow down cities, pay close attention to factors like job growth, population trends, landlord-tenant laws, and short-term rental regulations.Happy to connect with you, and good luck as you jump in!