I'm thinking of getting an E706w as my main router combined with 2 EAP625s to be used as access points. More APs will be added later. The EAP625s will be connected with Ethernet cables. From what I have read, a hardware controller such as the OC200 is required in order for WiFi roaming (like a mesh setup) to be working effectively. Is that right?

I'm also interested in connecting the ER706w to a vpn provider (like surfshark) with the Wireguard protocol. Is this possible? Because when looking at the RT706W emulator, I can't see the option of VPN client, where you can upload a configuration file. Is this possible and how is the performance? Is it something I need to setup within the controller?

Also, how is it in terms of bandwidth control? I'm looking to combine 3 WAN ports. One 50mbps line (the max copper line in my area), a Starlink connection and a 4g/5g modem router. I'm looking to use this setup in a small hotel with around 80 persons capacity. Is there a way to limit each user to a certain bandwidth limit or  would you suggest a better way to do things? At the moment, when a few guests are watching videos on YouTube others can't even load a web page or are even having trouble sending an email.