I suffer from allergies - not terrible but enough -- and they
  were REALLY bad in New Jersey. But in Naples, not so bad.
  Wouldn't worry about mold - never had a problem with that. On
  "high pollen" days I might get the sniffles now, but NOTHING
  like Jersey. It's worth it. Nothing's cheap down here, but
  there's a reason why ppl keep coming down here in droves. And
  not just for vacation anymore - but to stay permanently.