A podcast/BubbaRawCast alone won't get them enough money. Why not sell the BubbaRaw broadcast to Sirius? They can insert bumpers and commercials as they do now, and air it in the afternoons. I'm sure there's a lot of truckers that don't have constant internet access, so a national radio platform could still be a good thing.
FM show from 6 AM to 10 AM. BubbaRaw from 10:15 (or whenever) lasting about 2-3 hours. They've said that on Fridays, they have to scramble around and change everything up. I'm sure they'd appreciate an extra 15-20 minutes. It would let them stretch, smoke, poop, eat, etc.
A podcast listener would hear "Bubba the Love Sponge, back in a bit." This would immediately be followed by about 5 seconds of silence, then a pre-recorded prank phone call or a song parody, whatever.
A Sirius XM listener would hear exactly the same thing, but commercials instead of the 5 seconds of silence.