Returning to Taiwan - quarantine at an Airbnb?

Based on some responses from @bingobango here and @Joesox, @EnglishTsai, and @chaitea in the thread Do people traveling from the USA have to quarantine? it seems that Airbnb works for quarantine, at least in some areas.

Based on what @intercitydisco and @tando have written, the city government of Taipei has announced that they won’t allow Airbnb quarantine. But in other cities it should still work, right?

If arriving travelers are planning on using an Airbnb for quarantine, what should they say at immigration at the airport (and on entry paperwork)?