You're thinking of going there? Do you know with which company? Air Fiji or perhaps one of the charters that fly to the resort islands?
Cost of living may be expensive depending on your salary. The rental market got a bit more affordable following the Dec 2006 coup d'etat. The coup hurt the economy quite a bit, but tourists have picked up again, which means more business for resorts and their charter sea planes.
As Walu said, say Bula and bula vinaka a lot, smile (you'll be pretty happy), and get a few bula shirts. It's a gorgeous place with the typical developing country combo of very up-scale (e.g. Denarau) and poor areas (a lot of small towns). Have you considered Seychelles or Maldives, or Hawaii as suggested? All are touristy islands with a couple of charter operatons.