Arlo is default answer. I returned mine as frankly they are a bit crap. Regular loss of signal, app buggy and crashing and worst of all can take time to wake for motion, up to 10 seconds, which is enough to get down the side of the house. All of this things happened randomly and I swapped cameras about to check it wasn’t signal strength or a dodgy one.
I’ve gone for a hard wired swan system, and paying for installation, will only work out slightly more than the arlo for a 4 camera system.
You can also get Yale smart alarms relative cheap and have door sensors / pirs on your outbuilding (which I have) annoyingly there is only 2 modes, part and full alarm rather than arming devices independently. I have part for the outbuildings and full for the whole house.