Ah yes the mythical 'true geek' unlike the rest of us pseudo geeks.
As chenks has said the DHCP lease time on the VM dynamic IPv4s is long to the point that it's unlikely it'll change, the only thing it being dynamic stops you doing is mail server hosting. If you want an IPv4 range that badly AAISP can provide an L2TP tunnel as a paid service with an IPv4 subnet assignable by request. The tunnel is limited to I believe 100mbps however, and will require setup on your end.
VoIP is better handled by someone who isn't your ISP to remove the link between services and failure points, in my case I use sipgate who so far have been a fantastic provider.