It can be a major boost to your bottom line.Good luck!

I'm starting to see a couple of cancellations at my STRs, though it hasn't been dramatic (yet).  

Likely to Revise 2020 Forecast Downward, But Not Dramatically: The situation remains fluid, and conditions could deteriorate beyond what is currently envisioned depending on the severity and duration of the outbreak, but if current economic forecasts of modest declines in GDP growth are realized, the effects of lower rates should help to offset the effects of a slower economy and increased economic uncertainty such that California would still achieve a modest improvement in both home sales and prices this year.

For example, depending on which “expert” you listen to, the stock market is: about to crash, will rise dramatically, will change little, etc.

I wouldn't do anything dramatic, but begin the search for someone more competent.  

Boost that immunity and watch out for that processed sugar!

This would considerably boost the return on investment as follows:Initial investment = 65,000 BRL (750 BRL rent), 2nd story apartment = 30,000 BRL (750 BRL rent).

I know you had the total gross rents being boosted by ~$500 a month.

When listening to the news, remember they make their money by getting people to read their stories and don't always present all the information and tend to make things sound more dramatic than they are. 

At the peak of the last recession, foreclosures boomed and the need for multi-family "workforce housing" increased dramatically.