How long would Laser Hair Removal take for legs and bikini line, and what would it cost?

I am thinking of getting my legs and bikini line done. I would want treatment all over my legs. I'm very pale (Caucasian) with very sensitive skin and dark hair. It's not too thick on my legs, but it's semi-coarse. It's thicker around my bikini area with the same coarseness. I was planning on doing it around Christmas time this year, but I wanted it to be all done by the beginning of May 2015, when I'm going on a cruise. I need to know how much I should save and if I would need to do it sooner.