I like your frontier style and that is what it is going to take to get modern high speed internet into Savannah region.
Make some kind of foundation or organization for the purpose. You can anchor it here in this subreddit. Good place for it.
the Chattanooga model - God bless 'em - will not work here because it is based in Chattanooga electrical company taking the lead and putting internet distribution parallel with the electricity, since they already have the distribution footprint, the trucks and grid, the accounts in place for add-on and the management. I doubt Georgia Power would get on-board, but I would not rule it out until they said no.
If you are looking for functional models, I think Moultrie has their own internet. Lyon, France has municipal wi-fi coverage of the city. Muni wifi is a whole thing you may want to research. It would not be the same power as fiber to the home, but it would make it so 100% of the households and business locations have internet access. imo, even if you have fiber to the home, muni-wifi sounds very useful. It is also useful to police and EMS.
Without a doubt, Google Fiber would be excellent because they already have a system + top engineers + integration of television, which makes it popular with the general public. Unfortunately, they have been basing the location decisions on taking surveys of cities and they only put it in where there is a high percentage of interest. Savannah is so retrogressive, I doubt an honest statistical response to a Google Fiber "do you want it?" survey, would yield, what? a 12% response? But that does not mean that is can not be done. Begin a dialogue with the Googleplex. Get on an airplane and visit them in San Jose or wherever they are. Maybe they have a regional representative.
If you want to do it yourself, the first thing you have to figure out is the location with the big internet pipe comes into town. For some reason, in Savannah, the minute you ask that questions, you would probably have county and federal agencies investigating you. It did not used to be this way. Theoretically, you can get access to the main pipe and purchase bandwidth from it. USA is supposed to be a competitive market for business. Once you figure out where you can tie into the big pipe and buy bandwidth, then you need a means of distribution: microwave, wireless rf, or fiber optic. Fiber to the home / business is the most powerful, although there are some new light-based methods in development probably 100x faster.
You have to start somewhere.