A building with no quiet period
Conventional commercial cleaning depends on a window when the building empties. Accommodation uses remove that window entirely. There is no hour at which the lobby is unoccupied, no point at which a lift can be taken for equipment without inconveniencing somebody, and no natural time for machine work. The building never presents an opportunity; somebody has to choose one and accept the compromise involved. Every scheme in this position eventually has to pick one.
That is an owners corporation decision because the areas are common property, and it should be made explicitly rather than inherited from whatever the previous arrangement happened to be. Different schemes reach different answers, and all of them involve somebody being inconvenienced. What matters is that the committee chose the compromise rather than discovering it, and that the reasoning is on record for the next committee.
