A:Answeryes, actually you have a guest account for each 2.4 and 5 Ghz - you can enable both or just what you need. Same goes for the "family" wifi. However, you'll have 2 SSID's for each... 4 in total
A:AnswerI have no idea. Here are a couple of links that might help you decide:
1} https://pickmymodem.com/approved-modems-wow-wideopenwest-internet-service/
2} https://www.approvedmodems.com/wow.html