MissAleisha, I replied in my HOF about the chapel but thought I'd give you some more ideas here. Annabellas is the chapel I got married in, it was gorgeous and close enough to the beach and rainforest for photos. Up the hinterland there's The Little White Wedding Chapel, they're the only two I looked at.
Reception venues, there's Harrys on Buderim that's quite reasonably priced, its a nice old restaurant. Up the hinterland, there's flaxton gardens, Laurels, The Poets Cafe to name a few. There closer to $100 a head, if not more but the food and views are fantastic.
I'd probably start by buying a copy of Sunshine Coast Brides, you can buy it online if its not in the newsagents down there. Its a lot more then just venues but it might help to give you some ideas.