Best type of property to buy for bad economy market

[Chad Friesen]

We are looking for our next rental property.  What do you think is the best type of property to own in a bad rental market to keep it occupied. 

I have noticed on Kijiji and Craigslist in the wanted section that in our economy in Alberta pretty much the only people looking are families looking for full houses.  

I like duplexes because your basically getting 2 properties in 1 but I also like that SFH's seem to rent easily in a down market.

Would you agree that houses are generally easier to keep occupied or am I off base on this.