Pros of key-less locks:- Able to set-up easy access even remotely- No need of changing lock cylinders, make key copies, or set-up physically the locks- Less risk of tenants having several key copies running aroundCons:- Some tenants are not up-to-date with technology (specially elderly class), so you may need to exchange the smart lock for a conventional one- More added cost for technology- Battery operated- Some have covers that if lost or damage, they are not easily replaced (specially battery cover). 

An elderly family member was managing this property before.

If I let the person with the "elderly, well behaved, 8lb Scotty" in, the next thing will be there's a mastiff in another unit with no preliminary discussions.

We came a day early and stayed at my house.Got there and found out that the seller was elderly, not going to be at closing, in a hospital in another state. 

Most of the rest looked to be elderly/retirees.    

Long story short, my parent's are elderly and have some medical issues going on.

or maybe i'll buy in a different area, or a different class of property (maybe very large MFR) or something like notes, trailer parks, self-storage of even something way out there like cemeteries or elder care facilities.  

Hello all, I will try to keep this as tact as possible but there is a lot to take in consideration.I have been trying to convince an elderly gentleman to sell his mobile home park to me for going on 6 months now.

I don't expect most elderly people to know how to do that. 

Or list it with a realtor.Do not put your mom in the situation where the lady or her relatives think that your mom 'took her house' as it could be an elder abuse investigation.