HI the type of REI strategy matters as well. For example, if your buy and hold, leasing out a bunch of properties, what happens in the market\economy may not make that much of an impact. Your tenants will need a place to stay, pay you rent, regardless. If they can not, then you will find another tenant. People will always need a place to live. This is why it is important to purchase in the right location - Education, Amenities, Employment, Transportation, are within reach. Also it is important to run analysis on cashflows for upper bracket of the rental market vs, lower to determine your cashflows in feast and famine years. If you can attracts tenants based on location and amenities, your worst case scenario in lean years would be lower income or break even, but not in risk of expenses overcoming your income and default. I am not sure of the other investors that over leveraged with mortgages - not sure if they did the right analysis or purchased in the right markets. Bottomline is Location > CashFlow . Check out sites like Rentometer and areavibes to determine market rents and location analysis respectively