Your WC sends a spreadsheet that labels everything that needs to be paid in cash - or at least ours did. We tipped the WC, JOP, violinist, videographer, photographer, and the reception waitstaff for our wedding. We gave US $$ and that was acceptable for both tips and the wedding costs that required cash. Also, we had around 50 people who verbally told us they were coming. Worry about final numbers after people book. We had a final number of 20 people. Seriously, people talk big and some will come but most get caught up in the fun idea of going on a vacation to Mexico but do not think about the reality (cost, time away from work, where to leave the kids or take them with which adds to the cost) until it gets to the point where they need to make a final decision. Then reality kicks in and people back out. You may end up like some who have 70-100 people, but most DW do not end up like this so don't worry until you have real numbers to work with. Also, the Capital One credit card is a good idea, but determine what you can really pay. Finances should be taken into consideration before you even send out the invites or start verbally inviting someone. By the time you have chosen your resort, these things should have been taken into consideration. Our WC told us how much extra it would cost per person above our 15 included in our wedding package so we sat down to ask ourselves, how many could we afford to have at our wedding and who did we really want at our wedding? Questions we would have asked ourselves had we gotten married in the US anyway. If you cannot afford 70-100 guests, then do not invite 70-100 guests. Our photographer was Erick Rodriguez. He is an amazing photographer and I highly recommend him!