Clogged toilets, appliance repairs bad water heater element, painting between tenants.

I bet the problem solving element of this deal made it one of (if not the) best deal you've ever done. 

Maybe a grocery store. 

I don't have a subscription to the WSJ so this is just today's headline, first page (online):Retail Bankruptcies, Store Closures Hit Record in First HalfRetail bankruptcies, liquidations and store closings in the U.S. reached records in the first half of 2020 as the Covid-19 pandemic accelerated industry changes, particularly the shift to online shopping, according to a report.

Even worse, his tenant stored stuff in a garage cabinet and that was infested and got into another neighbors car!

Liquor stores?

However you store the liquidity, bank, life insurance, investments etc. once you have the sufficient reserves you can take the Cap Ex, Maintenance, and Vacancy as Cashflow until you need to replenish the reserves.  

It's available at most stores and online on Amazon.  

Building Coverage – this mitigates and restores the building from covered losses and this coverage is required by lenders to secure loans.Building Coverage – i.e. fire, wind, water, vehicle impacts and other elements of structural damage.Loss of Rents/ Business Income Coverage – pays for loss of rental income when a building that is rented to others is damaged by a covered loss.

Romeo Manzanilla, 2020 ABoR president, commented, “We recognize there’s still an element of discomfort with listing one’s home during the pandemic and Austin REALTORS® are taking every precaution to ensure safe and efficient practices across the market.