In my experience of nursing homes, you've probably got your planned techniques the wrong way round Martin.
You'll need to extract the bedrooms, they're normally the cess pits

Lounges & hallways will generally just be foot fall, food & drink type of soiling etc. Only exception is when an incontinent resident uses the lounge, in which case they normally sit in the same chair in the same place so might need a localised extract/sanitising/deodorising which shouldn't present any problems in terms of down time.
Doing it that way you could do it all in one visit, get the hall and lounges done and dried, ship the residents out and then crack on weith the real tasty bit

Have fun

P.S. I would purchase a completely new brand of deodoriser and only ever use that for care homes. Once you've used it on pensioner pee you link the two smells together, then next time you spray soem in another custoemr's house you get paranoid you're spraying old peoples wee around the carpet because that's what your brain is telling you it smells like.
Bizarre concept, this effect doesn't happen to me with any other odour issue like dog pee or vomit. Only nursing homes
