From CBRE | 2016 Global Real Estate Market Outlook“Moderate economic growth with low interest rates, punctuated with bouts of pessimism and volatility—the factors that have characterized the world economy for the past few years—are likely to continue in 2016, supporting moderate growth in commercial rents and investment sales volume globally.”

How much risk and volatility are you willing to accept? 

@Drew Cameron there are a few options and strategies to move forward with, however Investing in a turn key rental property is by far the easiest strategy for B&H and has the least risk volatility.

One way that I have determined volatility in the rental market is to pull up the local property manager's websites and track property for a while.  

After 3 years in a low volatile market, I would doubt I'd be at 25% equity either.

Learn whats makes some markets and economies stable and others volatile and what makes the world economy tick. 

Baha M. there are a few options and strategies and markets to move forward with, however Investing in a turn key rental property is by far the easiest strategy for B&H and has the least risk volatility.

There is probably going to be more volatility, year to year and month to month on a property like this, which means you might gross over 100k one year, but only 60k the next.  

Further real estate investmentKeeping that in mind, I do not wish to have my money tied up in a volatile stock market.

So, in a larger sense, your best bet for stress testing might just be adopting conservative business practices and projections to shield yourself against volatility.