What appears to be water damage to the foundation can be caused by water intrusion at the roof that travels through the walls into the foundation (typically in block foundations).

I also hired professional property management a couple years ago when some of the more intrusive Seattle rules hit,   but again this was a modification of my existing plan which required that anyway so I could keep scaling beyond what I could manage by myself while I still have a full time job.

The home has had water intrusion at a sliding door that the caulking wasn’t maintained and has rotted the subfloor and started into a joist.

To our thousands of customers, many of whom are investors, it's about 1. driveway protection boards, 2. small footprint, 3. same day service, 4. smaller, less intrusive trucks (few want a tri-axle on their properties), 5. twin-door walk-in loading, etc.  

Bathroom Vanity and protecting the 2nd Floor door from water intrusion as it sits windward and it rains here quite a bit.

But, isn't more frequently than, say, twice per year a little "intrusive" to tenants just for routine maintenance? 

Next you'll be hearing the "mold" word...I'd install some kind of resilient flooring (lvp or similar) and let the tenants buy some large rugs that could get rolled up and saved from any water intrusion events.

I did that last year to show drainage problems, pool/pool deck/driveway failures, water intrusion inside, wood rot, original finishes on interior...  

Possible glass damage or water intrusion if not properly prepped (shutters, etc) and unlucky.

@David Krulac  my take on condo's is that in the right setting they are fine.. but when they turtle up they can be a disaster.My son bought one that then had a water intrusion problem that you and I would have fixed for a reasonable amount but the NO nothing HOA board members basically non of them know anything about Real Estate construction or litigation get sucked into litigating the builder from 10 year previous by the Lawyers they hire.. and after half a million to lawyers they lost..