I agree it depends on the hotel, airfare and what they want to do. It might save you money if you use a travel agent and use an AI resort. Our guests are looking at 2500 or so per couple for hotel stay and airfare. We aren't doing an AI so they will also be responsible for food and whatever else they want to do, aside from what my FI and I are planning for a group. (welcome dinner, whale watch and reception) So I would say it is up to your guests to decide how much they are willing to spend.