I would anticipate bodily functions as part of the job process, and indicate which restroom to use, put out towels that can be tossed, leave cleaning supplies in plain view, where brushes, etc. are to be cleaned, etc. Clear, even written communication up front makes life so much easier.
I’ve lived through several large scale renovations, and have always made expectations clear before the first day of work, like what time I’m expected home, and what I expect to see in terms of order and cleanliness. I’m sure I paid a little more for it, but it was worth the sanity to walk in at the end of work, and find the construction refuse out of the house, trash taken out, common area swept, etc.