Iraselma

Does anybody know how beach weddings work? We would love to get married on a beach, but I have no clue as to where I am supposed to begin, who am I supposed to contact if I even need to contact anyone.

What would you say is the average but reasonable cost for a venue Food,alcohol and about 100 guests, I want to make sure I'm not getting over charged or undercharged, just want everything to be perfect