Thanks for the input and the welcome, Old Timer. On the latter note, I'm afraid I may have you beat...
Foremost, I am trying to avoid having to buy a computing device for the remote property ("Rental"). I have internet set up already, and a router. I mean to add a secure PoE switch, about 8 cameras for now - and hopefully nothing else. Maybe that was already clear but I thought I'd offer more detail in case it's helpful. So far, I * believe * that squares with your input.
As for the risk of loss of connectivity and potential loss of recordings, I wonder whether I can mitigate that significantly via local storage on each camera device. I believe the system, overall, is to act as a major deterrent (i.e., "that guy's got cameras leave him alone"). Needless to say perhaps, I still want actionable content if indeed something happens, but I'm thinking the probability of something happening plummets to near zero with appropriate indicators/signage. That said, I'm not making a case for just setting up some bluff cameras, of course. It's not a high crime neighborhood, but crime has gone up with two mailbox break-ins in a year where, for the prior 20 years there we none.
I will set up VPN access to the Rental, but I've wondered whether, with the right port-forwarding at the Rental, I'd need to be on the VPN in order to run BI remotely.
Hopefully, I have not missed the point. I think the key is my goal as to leveraging existing hardware (in my house) and not having to buy unneeded computing power for the Rental if possible. As further background, I've over 31 years with a major IT consulting firm, but I wasn't always the hands-on guy. So I can be surprisingly knowledgeable and puzzlingly naive, sometimes, at the same time.
Please let me know what you think. Thanks for the help.