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

Investment Info:

Single-family residence buy & hold investment.

Purchase price: $145,000

Cash invested: $15,000

I obtained the home 9 years and am holding it for cashflow as a single family long ...

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

If my property is a duplex, I'm assuming I can add the 3rd unit as an Accessory Dwelling?  

Southbay beach cities are beautiful!

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

The algorithm scans keywords in your listing description and even the alt text of your photos to determine relevance.For example:A picture of a game room could land in the "Play" category if the photo’s alt text is labeled something like: “Amazing game room with ping pong and pool table.”A picture of a beautiful view of land with the alt text being “Beautiful view of the countryside”Your photos can do more than look good—they can strategically get your listing into multiple categories by including targeted alt-text descriptions.The more categories you rank in, the more visibility your listing gets, leading to more clicks and higher rankings in Airbnb search results.Testing and Improving Your CTROnce your photos are optimized, it’s time to test their impact.

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

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

I have family in the Boston area and they vacation near Dover, a beautiful city.