Also look at the landscaping, are there overgrown weeds everywhere or is everything neatly maintained. 

Landscape and pressure wash house.

Important variables for a buyer to consider are (1) strength/quality of the tenant, (2) length of remaining lease term, (3) rent increases (if any) in the primary lease term, (4) entity that guarantees the lease (if applicable) and (4) demographics of the location. 

Aside from real estate being very local, some general principles I follow that serve in any economy :1- Follow proper underwriting principles based on my specific investment style ( value add etc..)2- Use leverage to my advantage but never over leverage my position.3- Keep proper cash reserves.4- Educate oneself in the economy of the market I’m investing in, including jobs, changing demographics, historical cycles etc...5- Surround myself with the proper team members who will cover the areas I am weak at and are real experts in their niche. 6- Knowing when to cut my losses.7- I use real estate investing as a way to achieve more important milestones In life including family, health etc... this keeps me focused on the big picture and adds more objectivity to the process.8- The bigger the portfolio, the more risk one gets exposed to in a turning market and the harder it gets to change direction.

This demographic is usually still plugged in. 

This means trees don't get trimmed, roads re-paved, sewer lines replaced when roots grow, landscaping done ect.

Most there are usually C or lower just because of demographics 

Landscaping was a challenge.

This topic has been around forever, but it's now 2019 and the landscape continuously changes. 

Still own and occupy the property, slowly adding value through renovations and upgrades including whole A/C upgrade, roofing repairs, and landscaping.