i cant understand what is your idea , but if i think , your problem can be resolve with a Interface Bridge to and add ports to that interface . and set only one ip address to that Bridge Interface .
Actually setting all port to have static ip isnt necessary.
Just that I’m new to network so I have no idea whether is it possible.
But now i cant even have 2 PCs connected to internet base on videos posted in youtube.
Wireless is visible and computer can be connect but no internet as well.
if one of your eth port connected to Internet on that router, then you will need to add a masquerade firewall to that port so that the rest of your eth ports can reach outside of your network. (Internet).