1. How much does it cost to get static ip service?2. Does the static ip have to be assigned to the cable modem or can it be set to use bridge mode?3. is the standard reverse dns hostname the same (ie: *.res.bhn.net) or different (ie: *.biz.bhn.net or *.se.biz.rr.com or something else static.res.bhn.net?)?4. is custom reverse dns available?
1: $10/month for one2: It can be used if you're in bridge mode, I do this3: Mine comes up *se.biz.rr.com4: No idea
Frank you will not be able to run a mail server without SMTP relay service and you cannot get a customer PTR.