I've been doing some online investigating, and I'm totally confused.  There are a lot of great smart locks for vacation rentals, but I also have some Residential properties that are a ways away from my home base. 

I'm looking for a good lock system, that logs entries and exits, that doesn't rely on cable modem reliability (i.e. Cell Tower Link), that allows me to give access to contractors, and gives my tenants a sense of privacy.  

Any ideas?  I'm tired of showing or hiring people to show residential rentals.  The vacation solution has been mastered, but the residential solution seems to be lacking...