Given the technological world we live in today, it surprising to me that it still works.  

NAREB and the year might surprise you because it was 1950. 75 years of negotiating commissions later, there are more real estate agents than ever before, so clearly real estate brokering is different than stock brokering.  

The thing is there was a lot of appreciation in 2021 and parts of 2022.Real estate didn't appreciate(in general) much from Summer 2022 to start of 2024.In general, the investment, while lagging behind the stock market return, is not a bad investment.You got 10% cash on cash return in year 1 and 8% cash on cash return in year 2.It was negative in year 3 but that is okay if you beleive it to be around 10% going forward.A lot of investors are starving for cash-flowing deals so I am surprised these properties didn't appreciate much.

Very conveniently located on Nolensville rd going into downtown.

Next, and you may be surprised, what hobbies and other interests are important?   

I will say the SBA never even asked for my flood insurance (which was surprising). 

You would be surprised how cheap a HELOC payment is when it's interest only.Put in some LVP flooring.

Nashville Yards is set to open in the Spring and the new Pinnacle tower is gaining office tenants like crazy - much to my surprise. 

And like you note, if there is a lot of generic office space available in a market, it becomes a race to the bottom on rents, as well.While you can be close to bedroom communities, most offices also want convenience to amenities.  

I leave virtual staging out of these photos if vacant, so there are no big surprises when people come to see the house, and it's empty.