not only would the headache and cost of air travel be eliminated, but the lure of riding on the largest and most modern undersea tunnel would certainly be enticing enough that many tourists would be more inclined to include a few days in korea on their itinerary.

enough that이요~
너무나 충분해서 that이하 하다 로 해석되는 것 같은데, 그러면 enough 를 so great 으로 봐도 무방한가요?