The house had some signs of foundation settlement when he bought it which were chalked up to age, however it’s clear now that there has been more recent movement (some of this may have been due to an earthquake a few years ago) causing about 3 inches of settlement along this very small house.   

.: Quote from @Bruce Woodruff: Not being able to influence the stock market also means that you have no direct control over the asset's movement up or down......I like being able to actively influence the value of my asset..... :-)Couldn't agree more.

Quote from @Don Bessette: I have a 30 plus year tenant that can not keep up with maintaining their unit, it is filthy inside and in desperate need of renovation, all systems are in good repair and I respond very quickly when issues are brought to my attention.It is also well below market rent, and they struggle to pay the current rate.Looking for suggestions on how to gently proceed with the notification to move. 

Pretty common we see flips that were fixed, but don't sell fast enough before new movement cracks the grout and sheetrock. 

There is clearly some movement or the tiles would not have cracks in the grout.

For example, if the roof was "under insured", or if the ground moved below the roof support (I learned recently that  earth movement is not covered under some policies, such as those on the bluffs of Lake Michigan falling into the water).

The structure also allows for mitigated tenant and maintenance risk, but it has increased dependence on market movements due to being appreciation based.

for movement or settling, 4) Maybe most important because it's so hard to correct...the grading at and around the house.

I recently came across domus.pro, where you can upload a property photo, choose a camera movement, and generate a video for around $0.30 per clip, with 4K options too.

Points taken, the price movement is probably not as big of an issue as liquidating before I need to (at closing).