Hello,
I’ll answer some of your questions…
You basically have the just of it.
The cameras can only connect to the Homebase via its own proprietary hidden SSID and uses 2.4 G Wi-Fi.
Basically it acts as a Wi-Fi repeater / extender once connected to your network.
If you have the HB connected to your home’s Wi-Fi it will broadcast on the same channel I don’t know if it uses the same channel if connected via Ethernet cable.
Initial setup of the HB needs to be done with an ethernet cable connected to your modem / router.
After that you have a choice to either connect it via Wi-Fi or leave it as is.
I suppose you could connect it to an ethernet port on one of your mesh devices, you’ll have to test that out.
Now if you haven’t purchased it yet, take a look at their SoloCams as they are standalone units, meaning that they don’t need a HomeBase to connect to.
Just your home’s Wi-Fi and the phone app is all that’s needed.