Media maestro Ted Turner has the perfect way of paying off fiancee Jane Fonda, should their future marriage go awry. Fonda would receive $10 million in shares of Turner Broadcasting Stock. The dollar billionaire won't even have to dig deep for the dough. Guided tours of the Atlanta-based CNN broadcasting studios at $5 a head are providing a lucrative sideline revenue. Punters walk the corridors of power and watch CNN's anchormen in action. At 3,000 people a week, the tour is turning in annual revenue of $780,000. So Turner will only have to wait 12 years and nine months before he's recovered his investment from petty cash. "Burn your butt" Jane won't be burning Ted's fingers.