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 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.

The Market Context:The area I’m working in is not a large metro but a poorer region where issues like food insecurity affect 14–20% of the population.

Las Vegas's average annual population increases by 40,000 to 50,000 per year.

I'm definitely still looking at it, but one concern is the population growth, it seems to be decreasing slightly? 

You have higher population with a lot more economic opportunity.

However, that's in a sparsely populated area.

You would be coming onto market at the prime time and its in downtown so hopefully it'd be contracted for the sell within a month, but northern Cali is a slower market sometimes since we're not as densely populated so id say 3 months.

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!

Belize is known for it's Banking and Offshore capabilities but, like most places that are "$ havens" the regular population is usually very poor.