It will be interesting to see what kind of responses you get.
It would be a rather ambitious undertaking..... I think. Filling the time with sports would appear to be more expensive than filling the time with music from an automation machine... and since Part 15 stations usually serve a very small geography, which translates into a very small revenue area, it will take a lot of imagination and skill.
I would offer this concept: Maybe you could team up with a number of other people around the country who want to do the same thing. Each of you could originate your own take on sports commentary, and they via the Internet and FTP you could organize "a pitch in dinner" in which each participant provides maybe one hour a day and everybody in the "pitch-in" ends up with a days worth of content.