The hull
Vessel class is the largest single lever. A day boat, a catamaran and a superyacht are different orders of magnitude before anything is added.

Rates & dates
The base rate is the whole boat for the block. This page says plainly what that covers, and the short list of things it does not.
The base rate is a package, not a deposit against a running tab.
Captain and crew
Fuel
Lunch
Drinks
Equipment
Fees
Chef
Anything not on the left is quoted in writing before you confirm. Nothing appears at the jetty that was not in the quote.
What moves a quote
The block is the unit. These are what move it up or down once the block is set.
Vessel class is the largest single lever. A day boat, a catamaran and a superyacht are different orders of magnitude before anything is added.
4h, 8h or 24h. Overtime past the block is charged by the hour, and the captain flags it before you cross the line rather than after.
A chef and menu sit outside the block as their own line. On a crewed superyacht they are usually already inside it.
Send the date, the group size and the shape of the day. The desk replies with the figure and what sits outside it, in writing.