Here is what I know based the information provided:
Yes
I believe they said it will support 75 per node, I would always add one more than what is needed. So based on your count, I would get 3.
Yes it should, The standard mesh supports IPV6 as the Pro should as well.
Should be the same as the standard. you can setup Port Forwarding Rules to Reserved DHCP Clients. You can then set the Internal and external ports. Is that what you are asking?
Can’t answer this question - Sorry
Can’t fully answer this question - Sorry. But I am sure it will use the same as the standard Wyze Mesh Router:
Is there any news @WyzeJasonJ on the USB port supporting external storage as some type of NAS or backup location for Wyze cams?
I also wonder if there are current plans for it to support a USB printer to be used over the home network
I believe you can set it up the same as the Wyze Standard Mesh Router. When you go through the installation, you are prompted to use separate SSID’s per band or one Mesh Setup. When setting up my Sons, I chose one SSID for all Bands. They have been working great with all of his non Wyze devices including all of the Wyze Devices.
I’m with you, and frustrated that it’s only listing multi-packs. I only need 1 unit, and have been waiting to buy it since I learned about it months ago. I’m hoping it’s a e-commerce glitch because the e-mail that I received earlier advertised selling them individually for $173.99 .