prob with vpns is most won't give a IP list. So say you're in new york area, everyone for that vpn provider will be routed through a single IP, which is usually a generic gigabit virtual server route. They're sold for getting past netflix and hulu, but in this type of scenario could get the account banned by association.
I was lucky with my vpn and got an IP list for worldwide. They've since removed this service, but I still got the IPs.