I am just so so so excited ! I feel like I made a breakthrough today! I found 3 resorts whose wedding packages are for UP TO FORTY GUESTS!!! This gave me such a sigh of relief! I was really starting to panic because even the largest packages that I had found was for up to 20 guests, and an additional 20 guests would be an additional $2000-$3000 (which was going towards my outside photographer).
I haven't done too much research on the resorts themselves, yet. But, if anyone is interested, the resorts are: Grand Sunset Princess (in Playa del Carmen), Riu Palace Peninsula (in Cancun), and Riu Palace Mexico (in Playa del Carmen).