https://therentalgirl.com/tic While these are primarily Ownership oriented, I hope you will find it helpful in managing the "shared" aspect of your rentals...

Upgrade to a commercial-style stackable setup that can dry faster (30–45 minutes), hopefully fitting in our existing laundry closet without extra electrical work.Any recommendations or specific brand/model suggestions for handling this high-volume, semi-commercial laundry?

Your life style has lead you to this situation and you must change your lifestyle in order to be successful with real estate. 

What is not helpful is the assumption that some responders made that the root cause is the PM's communication style was not to my "liking".

I think the biggest mistake that people make, is thinking that investing in STR´s is some totally different style of real estate. 

Individualized container homes would be ill suited for assisted living style care.

I am in discussions to seller finance a townhome-style quadplex.

This way, if someone feels rejected unfairly, you can show that your decision wasn’t based on any illegal discrimination, but on consistent standards applied to everyone.Alternatively... you could just ghost applicants but that's not always everyone's style lol 

Rather, they are four former commercial real estate brokers, with one of them also an attorney in their 60s or 70s that have a true hands-on style of mentoring.

Because I benefit from more business oriented books I also like Who Not How and Gap and the Gain by Dan Sullivan and Ben Hardy.