Also, manufacturers because of the fluctuations in the oil prices, sometimes use lower quality materials.  

Events that continue for extended times with fluctuating repercussions are not usually part of it. 

SFH can fluctuate faster than duplex's in some sub-markets.

Are jobs a good indicator, or gas price fluctuation etc etc...

A lot of successful STRs have fluctuating prices, which are meticulously guaged by the surrounding events and markets.

According to this link they have 907 employees , that number has probably fluctuated but they still have a lot of employees .Also Invitation Homes is a public company now they went public early last year (2017) so one can actually be invested in the company without being wealthy .The price doesn’t seem to have moved much but it does pay a dividend of 1.92%

Cheap housing without a lot of fluctuation in market pricing and a large military installation.

Fluctuation in income and inflation. 

There is no risk once your diversified investments are a sufficient safety net.Leaving surplus cash as equity in properties is high risk due to market fluctuations.

China) looking for safe havens for capital preservation with currency fluctuations and risk of government intervention.