Interesting . . . about $3,400/person with eight passengers. Roughly 2x the cost of 1st Class from MIA to SJU + Tradewind to SBH. For someone with crazy money & a family or group of friends . . . why not! Not inexpensive, I know. However, in my small acquaintance with private aircraft pricing, it's not ridiculous when cost of operating the aircraft is considered.
I also emailed them for a quote for 2 people and was given the price of "$21955 for 5 passengers." I didn't question it at the time - might need to ask about 5 vs. 8.
In fact, on this route, with the lav, it is 5 passengers max. Not 8. depending on winds aloft, it might require a fuel stop on the way back (headwinds at high altitude between SBH and FL). San Juan or Borinquen airports are usually used to clear US customs and then keep going. 4.5 hours turn into 5.5 hours total travel time.
Basic catering included. Champagne included. Maya's to go catering is additional.