Due to the recession we become landlords out of necessity but this turned out to be a real blessing in disguise.

Bring on another great recession! 

The other reason they are historically a good deal is how they perform in a recession or recessionary markets. 

If anyone had any of these properties during the 2008 recession, did tenants continue paying rent? 

Oklahoma City was called recession proof in the last downturn and in our B and C class areas we held rent rates throughout that time as well.

Recession, probably, but recession and housing markets collapsing don't actually go together... 2008-2009 was an exception.

Run your numbers as is, test them under recession terms, and figure out if you will be satisfied with the result.Q(not numbered) - If you invest in turnkey you have to know your upside and make sure you have a grasp of CapX. 

If you give address or location I can get a lot more accurate:In 2015, there were 269 fourplexes sold in Maricopa county for a median sales price of $182k.So far in 2018, there have been 136 sold fourplexes in Maricopa county for a median sales price of $295k.Using that figure, the yearly appreciation rate for fourplexes as a whole in Maricopa county has been 17%.You'd probably want to get the figure for the last year to really narrow it down, that way you take any bounce back from the recession out of the equation completely. 

A recession is objectively due? 

Well the stock market has done well since the last recession, so in some ways I am jealous that I had money on the side lines or in real estate.