Just so you have some accurate information. Here is a comparison of households getting the various cable networks.
000's....................May 2017..........May 2018.........Change
ESPN......................86,946...............86,263............-683
ESPN2....................86,739................86,154...........-585
FOX SPORTS 1........83,594................83,491...........-103
FOX SPORTS 2........49,649................57,613...........7,964
You should consider replacing your word "most" with "some" and likely acknowledge that the target motorsports audience likely is among those who do ... e.g. if you won't spring for FS2, why will you buy anything I'm trying to advertise?
https://sportstvratings.com/how-muc...2017-cable-coverage-estimates-2-2-2-2-2/8885/
I'm not sure this is the correct link, but if you click through it, you'll see where I copied and pasted these four lines of data. The use of the dots was the only way I could find to present something that approached the quick readability of a table.