Size of boat does matter. Anything over 40 feet a mate is prudent. I charge $250/day per underway day (over 2 hours) and $100/day for the mate; $50/day for provisions and travel expenses. When not underway, due to weather or repairs, $150/day. I do minor repairs, such as filter changes and safety fixes. Anything else the owner is consulted before proceeding. Additionally, I have learned to reserve the right to have a recent survey report and to adjust my rate upon arrival. I am also considering adjusting my rate based on the boats age. Under 10 years = regular rate, 10 – 20 years a 20% premium, above 20 years, 50% premium. In general, the length of the trip is longer than originally planned and the owner needs to be in agreement with this reality before the trip starts.