My local cell tower is connected to the same street cabinet that my wired internet connection is connected to, and the speed of both of them is about the same.
I have a set of shell / powershell scripts that I run post-install to configure everything.
They are hosted on a local webserver, so it is just a one-line command to run the appropriate one.
And the biggest disadvantage of IPv6 is that each of your internal devices has its own address and can be directly accessible from outside. So you need to completely rethink how you do security.
There is another trial on additional charges before then.