$750 will get you a brand new 4500w Champion inverter generator that should easily accommodate your air/con.
Reality is they haven't got a clue what the weather will be much more than a week out.
http://coastalboating.net/News/2017/06-2017/13-06-HurricanePredictions/index.html#:~:text=After%20%20%20%20%20%20%20comparing,%20%20%20%20%20%20with%20data%29.
See the pre-season hurricane forecast. It's nothing to be off 50-100% on the number of storms and that prediction is almost as likely to be high as to be low. That suggests they really don't have much of a handle on long range forecasting.