Earlier quoted context omitted.
You aren't allowed to bury cat5 in your neighborhood without government approval, and they'd tell you to just lease time off Comcast lines. What will you connect your cat5 cable to?
Plug your router into your neighbor's, and everyone else that wants to join your new ISP. I don't see the difficulty; it's just as easy as starting a new eBay site and getting people to sign up
Startup cost is not equivalent to "getting customers" cost. I can launch eBay 2 tomorrow, I cannot do that for Comcast2.