Although this stuff can be great fun, you have to stop and ask yourself why the market is "under served" and why there isn't already some dude supplying these customers, driving around the city in his Lexus and waxing his new boat on the weekends.
The unfortunate truth is that there just isn't that great a business there, especially in light of its quite high capital costs and quite significant risks.
It is a business that suits larger players who can spread the fixed costs across many cities. It is a business that suits providers offering a basket of services, not just IP transit (TV, Phone, value-added network services). It is a business that demands either a) high price boutique offerings (e.g. the people you end up buying your upstream connectivity from) or b) rock-bottom/who-cares-about-quality, high-volume products (e.g. Charter/Comcast). A small new player can't compete in either of those markets.
I could go on, but really : would you be super-excited if you had the idea to build better electricity transmission lines to a bunch of folk; or a better sewer system? No. And the reality is that IP connectivity is not much different to these other utilities.