LittleBill wrote:
if you want to give a certain AP setup a try, get the 3 device Netgear orbi,( no idea on the size of your house) and see if it has enough power for you, this may get it done,as it backhauls the data over the AP's on 5.8 while giving out a 2.4 (like i mentioned above, this may be your best shot and easiest, may not be the cheapest.
Google Mesh is a bit less expensive option that may help with the crowding on the 2.4 Ghz band. They don't have a dedicated 5 Ghz band for talking to each other like Orbi does but most tests I've read say that it doesn't really affect performance much.
Google MeshLike I said before, I have 4 Nest cams on the Google Mesh network. I, too, had tried extenders and whatnot but the cameras either kept dropping offline or would warn me that video quality was suffering because of low bandwidth. But, unlike the OP's cameras, the Nest cams will switch between 5 Ghz and 2.4 Ghz depending on signal strength. When I was having trouble I had Nest take a look at the signal strength and they said my biggest issue was that they were constantly trying to switch between 5 Ghz and 2.4 Ghz because the 5 Ghz was marginal (as you know the trade-off for the 5 Ghz speed is distance/obstruction limitations). I disabled 5 Ghz on my outdoor access point so I know at least 2 of the cameras operate exclusively at 2.4 Ghz. The other 2 are likely 5 Ghz given the proximity to the Google Mesh devices. But then I also don't have an NVR in the mix...