[tor-relays] Advice for new exit relay

Hi, excuse my bad english. I would run an exit relay on a virtual server. For now i run just a non exit relay on my own mini server. I don't like too much do not have full control on the server, but, for me, it is the only way to run an exit relay. How do I know which service allow me to customize WHOIS records, so I can put my email address on report abuse section? Could you suggest me some providers that offer unlimited monthly data too? Regards Gigi