There has been a lot of data coming out showing that many STR markets have become completely over-saturated with supply. ...it doesn't take a Ph.D. in economics to understand what happens when the aforementioned diminishing demand combines with an overabundance of supply.3.

When tenants age in place, their "will"" might be there but their "might" may diminish.

Overall, now in Oakland and San Francisco price increases are diminishing and I feel that we already passed a peak in late 2015. 

I'm personally quite conservative, and am in the middle of a refi on an investment property; I'm going for a 20 year fixed, at 4.75%, fully amortized over 20 years, and diminishing fees for prepayment for the first five years, because I'm not planning to sell; and I'm highly confident that the rents will generously support the loan.  

A 20 year old guy with youth, testosterone, hormones, "pent-up energy", its just so hard to save.

You can get used or new ones pretty cheap that are in the upper half of the energy use spectrum.Insulation upgrades follow a path of diminishing returns. 

On the plus side, the contents of the house are diminishing.

My agent tells me the winners are making offers that diminish their equity capture.  

But as your wealth grows you will experience diminishing returns and substantial tax bills.

There is a point of diminishing returns in rehabbing and common sense must prevail if one intends to stay in business in an increasingly complex and competitive world.