Sometimes my brain are disconnected - Out of order, so to say.
Why didn't I search for it and Voila
"how much does a captain cost for a yacht" =
Captains cost roughly $1,000 per year per foot of boat
Change the search pattern
how much does a crew cost for a yacht
Here I found a page where you can calculate cost.
https://www.luxyachts.com/yacht-cost-calculator
And this
https://www.crewfinders.com/yachtcrewsalaries.shtml
It cost a lot to have a fully functional crew.
Markus