Set up 4 reolink RLC-510A cameras at my place when we moved in. Was running them off of ispyagentdvr for a while but a friend of mine has been working on an NVR that I'm currently testing out that works well.

Completely local POE cameras that didn't break the bank and a free NVR that's easy to set up and manage.

Highly recommend Reolink for this purpose