Chococatte,
My cymbidiums stay out all winter - I could never put 2000 plants in and out at the whim of the weather. Culture under the N. Florida conditions does take some preperation and know how. Suggest you read the following. Loren has detailed very well how to be outside - no use reinventing the wheel.
Basic Cymbidium Culture and
January 14 Freeze I have exhibited in flower - after they had icicles on the flower spikes. It will make you nervous but you can grow a lot colder than you might think.