I didn't catch if you are having a legal or symbolic wedding. If you are having a legal wedding in Mexico there is a requirement of being at the hotel 4 consecutive business days for you and your witnesses.
For a symbolic I do not believe there is a requirement of how many days you need to be there before.
We designed our week so that the wedding would fall in the middle.
Our wedding week was from Wednesday to Wednesday and the wedding day falling on the Saturday. The majority of our guests stayed for the full week but having the wedding on the sat helped some of guests book a 4 day weekend trip since they could take the entire week off. It had its perks.
We had a welcome dinner on the Wednesday, bachelorette/bachelor party on the thursday and Friday was last minute things, and prep. I don't think we could have gotten away with doing it any sooner than that. Sunday we had a photoshoot and Monday we had an excursion. Tuesday we relaxed and cursed ourselves for not booking a longer trip, and Wednesday was home time.
Good luck with your booking. How exciting that you are staying at a brand new hotel.