One word: Money.
It’s been tried. Back in the 1990’s Paul Weyrich founded NET (National Empowerment Television) which I’m sure would fit your conservative bill. It later became America’s Voice. Whatever you call it, it was never profitable and died a horrible death.
When most FReepers use the word conservative they’re really referring to paleoconservatism, and to be honest the numbers are small, really small. I would argue with anyone who thinks that conservatives of all types combined make up anything resembling a majority, but when you narrow it down, it’s tinier than most would ever admit.
A freedom oriented, tea-party type news network would take over the world.
Not stuffy.
Defiant. Edgy. In your face independent.
THAT is what would sell. Not dignity. Defiance.