If that's not too intrusive a question, I would be curious to know about your fears regarding such situation? Many people would consider this a benign thing - after all residential cleaning services is a multi-dozen billion market worldwide, growing at 5+% YoY, and a non-trivial part of that necessarily involves letting cleaners clean without owners' supervision.

Then again I'm asking as a European citizen living in a country with a comprehensive legal system, a functioning police force, cheap insurance policies, so on so forth. Certainly that ecosystem plays a role in our inner fears.