This sounds like what I’m using (not sure if you really mean ‘rooted’).
I have mobile broadband, enable the hotspot on my (Android) mobile and use that. Yes I often have to update my IP, but it takes a second (I just keep a tab open with the invite URL in it and I can see if it needs updating whenever my PC boots).
EDIT: these days I usually use a VPN too, but it also works without that.
I don’t see why you can’t also do this.