Yes, yes: a professional viedographer will cost money. But if you think your Uncle Pedro is going to do anywhere near as good a job as a pro, you'll be sadly disappointed. (And this is your WEDDING: there will be no do-over.)
Just think about this, and fast forward ten years. How cool will it be to HEAR you and your partner voices say your vows? And see the two of you be introduced for the first dance? And watch your friends and relatives dance the night away?
A pro will know about microphones. And where to shoot, what to shoot, how to edit and document your wedding, reception and the special moments Uncle Pedro will almost certainly not be able to handle.
Some great choice are HERE.