Nobody mentioned searching on-line "county land records", so I'll add that as a suggestion.
Find such on-line sites by using a search engine and text, such as,
(myCountyName) (myStateName) parcel search
Use "county's search engine" to discover who ownes property at address, recorded
on your copy of membership record.
Results should show "owners name(s)".
"Billing Street Address" is important, because if it's the same as
"Location Street Address" then owner probably is living at that address.
If "Billing Street Address" is different than "Location Street Address", then
dwelling is probably a rental.
With "Billing Post Office Address", one can not
be sure. Owner(s) could still be living at "Location Street Address", but
having their "property tax bill" sent to Post Office or they could be renting
to another person and with "owners" living somewhere else.
Often such "free county record sites" will also give information about
"property purchase date", thus allowing you to know how long
a family has lived within your ward. Sometimes it will also record
that "the ward member, which we are looking for" once owned that property
along with its date of sale -- thus, they've probably moved out; unless,
they "quit claimed" it to another extended family member (different surname),
in which case, they might still be there, being cared for, as they are disabled or elderly.
Another "scrubbing" source is
www.FamilySearch.org.
Search for names within "Social Security Death Index".
We've found at least 5 members' names in this index.
Some members had passed to Spirit World over 2 years ago.
This also applies to their spouse. Some just aren't on this planet anymore,
but are still listed on membership record as married.
Another site to check would be
http://www.legacy.com/NS/
From here one can search for obituaries.
Accessing some older ones might cost about $2.00 each, but they
will provide "date and place of death", other family member names, etc.