I know the French require liferafts, SOLAS / RORC Cat 1 distress flares kit and an EPIRB…

I’ve been in the Caribbean 35 years and have watched literally hundreds of yachts try to make a living chartering and most fail on two fronts……..one is getting enough bookings to make a go of it……
two is in having a RESPONSIBLE local agent who can clean the boat, wash all the linens and re-stow them, re provision the boat, make sure the batteries, engine, generator, refrig, lights, sails winches et alia work and then fix anything that is broken, top up the fuel and water, and do this sometimes in the 18 hours between Friday night and Sat morning when the next batch arrive, and then politely but firmly check out the charterers to make sure they know the pointy end goes forward and they aren’t going to run the boat up on Ushant….best to put the boat in service with a reputable charter company and pay them the 25-35 % to manage all these headaches for you, or if big enough, find a captain/mate-cook to do it all…there are several agents in St Thomas I have seen over the years and they work like madpeople in season to keep everything flowing along