Realtors listing is a great way to market it, Facebook is also an underutilized method.

In 2019 my mission beach units had average revenue minus cleaning of ~$80k.  

I remember seeing this method in many popular books and podcasts.However, the STR world has changed so much ever since with its exponential market growth.

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

Seems clean, visually appealing and somewhat updated.

If you want to scale using the BRRRR method I could send you a list of properties in terrible Philadelphia neighborhoods where you could easily complete the BRRRR and yes, you could theoretically "scale".

Do you have someone that manages it all including bookings and customer service or just specific parts like cleaning only? 

Do the Airbnb discounting, price a little under market, make sure your cleaning fees are at or below average, looser cancellation policies will all help.

Strategies like house hacking, the BRRRR method, and long-term rentals have worked well for me.

That might be especially attractive to folks who want to shed the clothes they wear at work to keep their living space more clean.