And hydraulic is a force that's very extreme. 

And a drain within reach of the standard drain hose?

If heat goes out in the winter we drop off several units, so they can be placed in different parts of the house - including every room with water like kitchen and bathrooms.We also have dehumidifiers, carpet blowers, shop vacs, puddle-sucker pumps, extra hoses, extra sump pumps with battery pack, squeegees, and portable AC units ready to deploy. 

Their fill hose sprung a leak or something and hundreds of gallons of water poured into the apartment below them.

Quote from @Chris Seveney: Quote from @Sam Wilson: Basically- As investors, we're hosed.

They will hose down the fridge and break the electrical in it.

Someone could also leave a garden hose running for a day.

Is it worth to invest and learn from their program in order to start my co-hosing STR side business just to get some extra money monthly?

Spray it with the garden hose it runs away and hides.

So you don't need any flying ambers, at 1500F anything combustible will just spontaneously burst into flames.I was thinking about the people I have seen on social who tried to wet down their house with a garden hose.