2) dropping a vape in a toilet mid stay is clearly an accident.  

Looking for suggestions on any specific building materials, fixtures, accessories, furniture, and tech for a STR.  

Does anyone have experience with ADU's (accessory dwelling units) in any market, but particularly Cincinnati?

which is allowing homeowners to build an Accessory Dwelling Unit (ADU) on their property.

It also says under the accessory uses section: "nonhabitable structure requiring a building permit." 

If your local market is very active and homes are selling fast, you may be able to get by with doing less.Your Home’s Condition: If your home is vacant or has a unique layout, using a professional stager who can bring in the right furniture and accessories may help buyers truly visualize its full potential.Your Budget: Talk to your agent to get an idea of staging costs in your area, as it can be the difference between your house selling and sitting.

The property is in an evolving area with an overlay for Detached Accessory Dwelling Unit.

Accessory Dwelling Units (ADUs) are an increasingly popular way to generate additional rental income on an existing property.

https://www.mass.gov/info-details/accessory-dwelling-units-a...

Converting SpacesConverting unused spaces like garages or basements into living areas, home offices, or rental units (such as an ADU – Accessory Dwelling Unit) can significantly boost the value of a property.11.