How long does it take to go to Cancun from Miami by boat?

There are several factors that have to be asked before giving an answer?

Type of boat?

Size of boat?

Average cruising speed of the boat?

Sail Boat what is the wind factor, direction, knots?

Example; I'm sailing a 37ft sail boat that averages 5 kph or 5.75 mph. Cancun to Miami is approx 525-550 miles around the northern tip of Cuba. So 550 miles @ 5 knots = 4 days