Does anyone have recommendations for an STR on-call service (not full property management), which will handle basic guest communication during their stay and handle organizing repairs (i.e. calling a plumber, HVAC, etc. ... not actually doing repairs themselves)?

It's no guarantee but it's a good place to start.

All contact, maintenance, inspection, lease, anything is handled in a queue....not a call.

There's also no correlation between deeds and permitting and if you feel the assessment is too high you can always appeal the tax assessment.

Multiple improvements done on this duplex in 2021, including new roof, gutters, flooring, drywall, electrical, appliances, and heating/cooling unit for the second floor.

Develop relationships with different providers so that you know how they operate and how they charge before you call them. 4.

I've been told by a paralegal that a lien isn't valid if the owner didn't authorize it, and there's no tenant (leasehold) relationship.

I think you might be googling the wrong terms and of course google is no replacement for local knowledge/help….The “notice to quit” requirement is 10 days.

No water is leaking into the unit, the ceiling tiles just get a slight discoloration.

No, not all property management companies operate the same.