You don't need a smart lock for the second one, a cheap indoor camera that can send you alerts achieves the same. An even simpler solution is a spare Android running Haven[0] (I don't know if Edward Snowden actually created it, but he's usually associated with it).

As a tenant (and a hotel guest) I've used both of these methods over the years. Granted, I've never lived in a home that has a smart lock, but I know I would feel much safer using my own hardware for the purpose.

[0] https://play.google.com/store/apps/details?id=org.havenapp.m...