BTW: anyone interested in this should join DN42, which is an alternative central authority, and does more-or-less this. Although 99.9% of DN42 links are internet VPNs because that's cheaper, physical links are also accepted because they're cooler.
(This reply was delayed by an hour by HN's rate limit)
If you ran your own ISP and purchased wholesale bandwidth, would that not just include an ipv6, at least?
Purchasing wholesale internet bandwidth is another way of saying purchasing internet service (a lot of it). The company that sells you that is your ISP.