the boat I work on has a full time crew of 7, and we bring on an 8th person when we are being used. it costs approximately 100 grand a month in salaries and upkeep to keep the boat going. and the boat stays behind the owners house, so there is no real docking expense. If we were in a marina, some charge up to $1000 a day. If you want to charter the boat it is $15000 a day, but luckily that does not include our travel time, and then there is usually a 20% tip split between the crew. it is definitely not a cheap hobby, but we are actually on the rather cheap side of ownership. if you step up to a 170-200 foot boat, the crew jumps to 17+ people. some of the bigger boats, well into the 250-300 ft mark charter in the med for half to 3/4 of a million for a week, that is one expensive vacation.