Difficult if not impossible to get a consultant on this specific topic.
I had done a feasability report of such business plan a while ago for our charter company and gave away..Here are some clues,
-the cat should be big enough to make twice a year Atlantic passage
pretty fast and the weekly price
should be high enough to justify these trips. Otherwise, hauling out anywhere in dead season is cheaper.
-you should ensure at least 15-16 weeks of booking on both sides (32-35 weeks a year) for break even, not easy...
-staffing is a nightmare. You should find a couple , preferably married, one perfect skipper
who can deal with all kind of problems, a lady who will take care of cooking
, housekeeping, catering and helping the skipper
on long passages , docking/undocking, etc. They should be 100% reliable, very well paid.
-heavy buraucracy in almost everywhere, high fees
and marina expenses.
-charter restrictions in the Med. Changing crew is not allowed in Turkey
. (In Italy
I was boarded by cost guard and accused of illegal chartering. I was not and with my wife only on board was heading back home. Still, it took me a while to convince them.
Said this, I know some of boats that do this but I am pretty sure they are not making any money