The most important one is to provide for my loved ones and take the stress of their backs.

I can’t stress this enough.

This seems like a long term potentially stress free rental that gets better and better every year. 

If it is causing you stress not knowing if you will make the payments, then sell it. 

Ready to move units, maybe will come at high price but will be less stressful and give the chance to have access to immediate income/revenue. 

The time it takes to schedule, collect monies, clean and maintain the unit seems like a lot of stress and work compared to how much I can get for just renting my unit month to month here in Los Gatos??  

One morning told my wife I want to start looking for multi unit properties and pulled up multilistring on the web, after a few minutes saw the property, saw the potential, did some light due diligence, called my realtor, walked it a day later, pulled up tax records, noticed owner behind on payments and it was distressed just enough to make it tough for him but perfect for me & rents were below market rate stress due to lack of improvements...bam!

Stress of problems makes them withdraw. 

(sorry pressed the wrong button) Emergencies such as me losing my job of 21 years,  back in November. 

It may be well because of internal stresses of the concrete slabs and the foundation/walls, however that means the foundation is not doing so good.