Flighttickets:
There is lot of websites where you can find cheap flighttickets. You can fly to Tampa (1½ hour to the condo), Jacksonville (3 hours), Miami (4½ hours) and of course Orlando (45 min.).
Try f.ex. www.continental.com 
If you are flexibel about traveldate and the airport where you will be arriving, is there lots of money to save.

Renting a car:
There is differents car-hire service, f.ex.:
www.hertz.com
www.avis.com
Its a good idea if you pay the car at the same time that you order it, because there is money to save here.

Passport:
The passport must be machine readable.

Electricitet:
In the United States they are using 110 volt alternating current in the switch and special plug and for that you need an adapter.

Vaccinations:
There is no vaccination for entry into the United States.

Travel insurance:
We recommend that it represents a good travel insurance so you are covered by sickness and the like.

The weather: