Just bought a Reolink rln46 NVR and four cameras. I don’t have the doorbell, but every other feature you requested works flawlessly. It records 24/7 in 4K but can stream at lower resolutions if you want when you’re away from home on mobile. You can set what notifications you receive and when you want to receive them. You can even go back and search for events by type in the recorded video when they were never flagged for notification in the first place. I’ve been thoroughly impressed and plan to add to the system in the coming months.