Require all tenant-owned furniture to have padded or nylon foot pads.

We're close to some good outdoor rec - both winter and summer activities are <20 min away, and the quality of life here is good.

AirDNA showed $10.5K for the year and he gets $5K a week in the summer (outdoor pool with phenomenal view).3.

The tenant would have their own private entrance (rear of the house), parking (1 spot in driveway + road parking also available for guests and whatnot), their own laundry, as well as their own outdoor patio area in the backyard.

My question is should I build a wall separating both units completely so that they do not have any shared area nor run into eachother unless outdoors?

We were attracted to the area because there is tons of new development, restaurant's, outdoor amenities (trails, parks, etc).

Services such as pool maintenance and cleaning can be written-off your taxes in the year they're performed.That sounds incorrect - Just because something adds value to a house doesn't mean it needs to be depreciated over 27.5 years.If the item is not attached to the structure of the house, it doesn't need to be depreciated over 27.5 years.An indoor pool may be required to be depreciated over 27.5 years.however, an outdoor pool does not need to be depreciated over 27.5 years. 

Example: STR Program - 1 Bed/ 1 Bath Unit- Determine key walls to paint and/or place wallpaper for the desired look- Determine required furniture (tables, chairs, beds, mattress, couch, etc.) and price range for the desired look- Determine required electronics (TV's, Smart Locks, etc.) and price range - Determine required decorative items (Pictures, vases, lamps, etc.)Hopefully, this gives an idea of what I am trying to achieve to set us up for a more planned expansion of our STR portfolio.

Golf, ski, woods, lake, and outdoor activities draw people to northern MI.  

Our thoughts are are a city/town that's a close destination to the outdoors, but also not too far from some major cities.Basically, the location isn't strictly determined yet.