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. 

After a couple of years of treading the path to frugality to build this financial runway, I've networked with the greatest people who made this all happen, of course, it took the strength, determination, time, etc to place myself where I am today but, without the mentorship of my two great mentors whom I wish used BiggerPockets so I can mention, I don't believe I would have made it thus far relying on some whimsical dream that this will all pan out accordingly, thank you for everything Greg and Lashawn.In addition, I would like to thank Bigger Pockets for connecting me with the greatest realtor @Stephen Schmitt Who took my dreams and aspirations to the core when we first connected and spoke about my future goals to replace my W2 job for financial freedom. within three months of me deciding to pull the trigger and get pre-approved, we found this killer cash-cow that apprised over purchase price!!! 

She has credit, he did not, but both had jobs and I still cosigned.

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560 (almost 30% probability of default), little to no good tradelines, lots of collections & chargeoffs, recent evictions.

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

If you’re looking to make real estate your new job and to earn cash now to use and live on like a job, then go for cash flow.

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.

If they were an employee of yours or a member of your team in a different business, would you dock their payroll if they made any mistake for you in their day-to-day job?  

I also recommend explaining what the penalty will be if she's not out as scheduled.

I guess my challenge right now is to define the strategy and balance all the factors, such as job and population growth (value increase), cashflow (demand & supply market, interest rate, property tax, maintenance cost), and risk control (insurance etc).