This is really a hard question for one right answer. There isn't one right answer.

I like the idea of getting input from all parties regarding what they want to eat, then have one or two crew members do the meal planning; for 10 days there are potentially 30 meals. Subtract how many you are going to eat ashore and then plan your meals aboard. Keep it simple for meals underway. Meals on the ball/anchor can be more elaborate but to what degree depends on the skills of the crew in the particular on board galley.

Costs: we developed a meal plan, from there we developed a provisions list (and we split provisioned - using one stop for a 7d charter). From there, an order was created, costs determined and IN ADVANCE, each crew member contributed to his share of the provision paying it to the Purser. One person (that was the purser) paid for ALL the provisions both initial and along the way. We also had a kitty. Each person contributed $75 for the week. This was for "extras" including potential for meals ashore. We ended up having enough in the kitty to do two extra meals ashore for 6. One at the Baths (lunch) and one at Foxy's (Drinks and Bar snacks).

Booze: we took input on favorite beverages from crew members, then had one bar meister (my son who is good at that) develop the beverage list. We drank way more water and morning after club soda than Vodka or Gin. We restocked a couple bottles of wine (more than a couple, actually!) and some beer. Restocked an entire case of club soda but just refilled plastic gallon jugs of water (planned a gallon per day pp and we probably used 1.5 gal. per day pp but don't go nutz over this trying to stock too much to start, just refill jugs (we started with 12 - two cases at Riteway) in a timely manner wherever.

Beer ration was 3/day, pp. Not surprisingly we drank more but not that much more. We drank less fancy drinks that required prep, even G&Ts, though we had planned on those. Hence, a full bottle of Vodka and one of Gin was donated to the Horizon dock staff upon our return.

Have fun in the planning. It should be that way.