If I'm Scott Frost, my brains tell me stay at UCF, my heart tells me go to NU, and my balls say go to UF. He can be rich and adored at UCF. Richer and reviled at UF when he can't beat Bama and UGA.
Then with NU...he either finishes the native son comes home narrative in the best way possible or goes back to hating the fans and feeling betrayed by his home state if he can't win.
Personally, I don't think Frost wants anything to do with the administration at Florida right now. You have Spurrier walking into coaches' meetings telling them what plays to run. You have the old AD Foley still hanging around telling people what to do. They can't build new practice facilities because there isn't any vacant land by the stadium.
I get that Florida is in a much more fertile recruiting area, but with that comes the demands that you win championships immediately, even though every other school in the SEC also recruits well and has better facilities. Keep in mind that both McElwain and Urban Meyer wanted to leave that place at the first sign of adversity.