I think that this could end up as quite a debate.
I used to run a traditional B & B in my own home and yes, every day I had to make sure that the common areas (entrance hall, stairs, bathrooms, dining room) were clean and tidy but then again, I'd do that anyway whether we had guests or not. That would, as you say, take about 30 - 45 minutes a day.
Now that we have a separate apartment as a rental, then it's a full 3 - 5 hours cleaning after every guest. This might be five times a week or every two weeks. Although our average stay is four days so roughly twice a week is usual.
It's not easy no matter which way you look at it!