To have a domain on your home DSL connection (all "on the cheap")
This assumes you already have:
After that it should only cost $10.
After all that you need to...
PURCHASE A DOMAIN NAME
I found Verio.com that offered it for $9.99 a year (http://www.verio.com/domain-name-registration/)
When I did it they offered a placeholder. Now they offer 25Meg webspace and email. But I didn't need that for this anyway.
Once you have the name you have to setup an account with ZoneEdit.
More to come later...