As you mentioned, it's fortunate that you have good 5G and 4G coverage in the area, which opens up some possibilities for remote access and monitoring.
One thing that comes to mind is using a smart lock system that connects to your home network or a cellular network, allowing you to manage access remotely. There are a lot of options out there, so it's worth doing some research to find one that suits your needs and budget. It might also be a good idea to have some close protection bodyguards on hand, just in case.