Overtime the sheetrock sags and causes the ceiling to hang and eventual come down.

Two / Three ac units will cause higher energy costs as well as a hot tub. 

You could also add a clause about your ability to terminate the lease if they cause problems in the neighborhood, don't cut the grass, etc.

This will simply causes prices to be even higher, and continue to constrict demand... 

To help those people in crisis that’s causing a severe strain in our system and community.

It could cause a low spot where things slow down and then it all compounds until there is a clog.

Now with the resulting inflation it would cause people would move to crypto currencies.  

Hey @Grant Woodward, you can never be too cautious when it comes to guest safety like @Lauren Kormylo said.There are dozens of things at your STR that could cause an injury or worse so making sure all the ducks are in a row and quackin' in unison is one of the most important things you can do.Like @John Underwood said, make sure you have a rock solid insurance policy that covers the pool and adjoining areas.

My concern is doing the cash out refi on my other rental and causing a new and much higher payment on it that I can't just pay off like a loan.

The electrician didn't want to do this because it would have caused more headaches with the inspector, so he says.