It is very difficult and incredibly capital intensive. You need either very deep pockets, like Oprah, or a very attractive demographic for advertisers, again like Oprah. Beck has neither. In fact, to a bunch of advertisers, he's persona non grata.
He could go the pay-wall model, a la Howard Stern's Sirius deal. But, Stern, a guy who had enormous celestial ratings, proved unequivocally that over-the-air or basic cable ratings just don't translate to satellite or pay wall numbers .
I'd better hurry up and claim The Apocalypse Network naming rights.