Wedding ceremonies are possible in the hotels of Cancun, the Riviera Maya, you can request the Pacific coast of the country, but it is less popular. The question is what kind of ceremony is needed, if symbolic, then a copy of passports and a marriage certificate, but if it's official, then the procedure is more complicated, the documents translated into Spanish will have to be submitted to a blood test directly in Mexico, so it's better to plan a train for 2 weeks