I really hate using words to communicate, they are such clumsy things when one thinks about it!

Be a good communicator and responsive to tenant's reasonable requests.

Communication is key

It was early and I did not think my communication was very clear so I tried to delete the post but I guess it left your 'quote' in place.So to answer your question- Yes. 

Furnished Finder does make it tricky since you need separate profiles for each room, but platforms like Apartments.com or Airbnb might work better if you're aiming for full-house rentals or structured by-the-room arrangements.If you decide to rent to multiple individuals:Tenant Screening: Screen each tenant thoroughly to ensure they’re reliable and responsible.Clear Communication: Introduce potential tenants to one another Detailed Agreements: Use separate leases for each tenant and specify shared vs. private spaces, utilities, and maintenance responsibilities.House Rules: Create clear, written house rules to prevent misunderstandings.Inventory Tracking: Document everything in the home (furniture, appliances, etc.) to avoid disputes about damage or missing items.Also, market your property with its flexibility in mind—like proximity to hospitals for traveling nurses or universities for graduate students.

Just make sure whomever you work with is halfway competent and communicates well, the latter is the most important.

A certified letter is good because they sign for it, acknowledging receipt, any other forms of written communication you can get to document that they were notified of the hazard probably also helps. 

This frees you to focus on higher-value tasks like growing your portfolio, owner communication, and big-picture strategy.2.Adopt a Portfolio Management Structure: Early on, I ran a departmental structure (separate teams for maintenance, leasing, collections, etc.), and it caused inefficiencies and communication breakdowns.

Neither unit has paid rent and has blocked us from communications.

I would keep and organize all of your communication around this issue, including gathering pictures of the unit and the area in question that was repaired.