I've about 50 Wyze cams for 4 locations plus a bunch of floaters. Stock was built up since 2018.
Plus one or 2 of several other major brands before I focused on Wyze.
Most of the Wyze Cams are V2's & V3's. The V2's cost about $25@ and the V3's about $30@ with shipping.
Inexpensive enough so when I have a concern about a leaking pipe or stray dogs I can put a camera on the area. I've about three I use for backup cameras/FEL cameras
My biggest problem had been bandwidth.
With 10 cams operational at my Mississippi site and an upload bandwidth of about 0.7Mbps or less I couldn't watch more than 2 cams at a time. After I was upgraded to fiber with 100 up/100 down that went away, I can run all 10 at once with live feed.
Wyze has done a couple of corporate screw the consumer actions in the past, one was to drop support of older Android devices sooner than expected.
But for me the cameras have been very "hardy", I think I've only had about 4 die over the years. And they were indoor cameras placed outside over winters.
Those get assigned as decoy cameras.
/edit - a big sticking point for years was that you had to go 3rd party app to even display on windows, but now they have it implemented so I can monitor my cameras with Windows 10.