Hi Jon, nice to hear from you , you have more info here , depart every day except Sundays , from play directly to Cozumel , no ferry , ,the boat is big and fast enough to carry 12 divers , like to keep small groups and personalized service. , more info here .https://www.scubatotal.com/cozumel-diving ,,, and answer your question in order
1.Yes boat leaves from playa and back
2.minimun divers 2
3.everyday except Sundays
4. Yes lunch , (nice and big sandwiches) fruit, (banana , melon and watermelon) bottled water and hot tea on winter
5. Is super convenient and comfortable to cross in the boat than the ferry , thas why we change years ago and divers love it. You can check some of TripAdvisor reviews to get a better idea
6. Yes we offer multiple days and also private tours
7. The prices are total including everything, everything, no hidden fees
Thanks for writing , hope to see you one day
Al.