If there's a way to get normal z/VM access to a
LinuxONE VM to reinstall the OS and a way to make them permanent, that'd
likely be fine, too.
I would not expect they would go with that. LinuxOne is a very "programmed" program of IBM, no flexibility.
I tried to get them to give me even a little leeway on expiration of my VM leases and they have said no, I just have to back up my data and restore on a new lease.