A: I am very sorry that you are having to deal with a situation like this during such a difficult time in your life.
You are most likely looking for a probate attorney. Probate attorneys handle the distribution of an estate after a person dies. They work with the court, debtors, heirs, etc. to distribute the estate per state law and any estate planning documents the person had.
A: The question would be what exactly do you rent. Do you rent a room and the kitchen and livingroom are common areas or do you rent the entire space. You have an expectation of privacy inside the space you rent. So, for example, if you rent a single room, you have an expectation of privacy inside that room, and thus there is no expectation of privacy in the common areas. However, if you rent the entire space, then the area for your expectation of privacy is the entire unit.
This does not apply to bathrooms or changing rooms or other areas where there is also a general expectation of privacy.