Yeah, I don't think that a town hall debate would go well for Trump, especially if they put in the new rules where they cut off someone's microphone if the candidates break the rules and start interrupting their opponent.
Judging from the first debate appearance, I could easily see Trump starting arguments with undecided Florida voters who ask him a question that he doesn't like.
It might work out better for Trump to call out sick to this one, and try to collect the sympathy votes from his base instead.