I am also getting married at the Barcelo in Mexico. I have just been sitting down and planning the details of the wedding and adding up costs and i can't believe what all the extras cost!!! I am also frustrated. i want an outside DJ, because they were cheaper ,then their $500 plus 2 hour DJ, w/out a dance floor. They want to charge $30 per our, PER PLUG, for use of their electricity.
i would see if you can buy a guitar or even rent one locally. I probably would come out cheaper in the long run.