how about let WTTO 21 as Independent Affiliate until I invent new Network for this station
The idea of a "traditional" independent station is likely unworkable today for a lot of reasons. When WTTO signed on in 1982, cable penetration wasn't nearly as prevalent as it later became and even so most cable systems had no more than 30-50 channels, if that many. Most metro areas had no more than five or six broadcast stations, including PBS. Home satellite dishes weren't available. More importantly, most independent stations filled their schedules with reruns of network shows from 5-20 years ago and movies, or occasionally live sports or the occasional network show that the local network affiliate chose not to run. Cable channels such as AMC and TCM that ran older movies weren't yet around. ESPN was yet to become the one-stop shop for live sports.
Today, most reruns of network shows from the past are now available on MeTV, Antenna TV, Catchy Comedy and the like. All of those channels are available in all or most of Birmingham on subchannels of over the air broadcast channels (13.2, 21.2 and 33.3). Outside of college football, the NFL and a couple of MLB or NBA games a week, live sports on TV are the near-exclusive domain of cable or streaming services. Most households subscribe to at least one if not multiple streaming services like Netflix, Hulu, Disney+, etc.
Most independent stations from 30-40 years ago are now affiliated with Fox or the CW. WGN from Chicago and what was then WTBS from Atlanta are now CW affiliates. (W)WOR from New York is now owned by Fox and is now the poorer cousin of that market's Fox affiliate. And in many markets, independent stations from the past are now affiliated with ABC, NBC or CBS because Fox affiliated with legacy Big Three affiliates (i.e., Memphis, Atlanta, Mobile, New Orleans, Tampa, Greensboro, Cleveland, Detroit annd several others).
The gist of my comments is that the business model that made WTTO successful 30-40 years ago would likely be unworkable today, not just in the 45th largest television market, but even in markets far bigger than Birmingham.