President Obama didn’t go to Hawaii three times within the first month of his first term.
Are you suggesting these three trips to Florida are the only trips to Florida Trump will be taking?
And a trip to Hawaii isn’t that much more expensive than a trip to Florida for the President. All the expenses — the staff, the Secret Service, the cargo planes carrying the bullet-proof motorcade vehicles, etc. are part of the package whether the President flies to Florida or California or Hawaii. The only real variable is the cost of jet fuel (more is needed to fly to Hawaii), but that pales in comparison to the cost of the President’s security.