Gotta agree w/ Debby
Also - remember whether Boynton or Jupiter, you need someone to drive the boat and follow your flag (which you carry) - you will not be anchoring; its all drift diving unless you get the really rare day w/out current - don't plan on it, especially in the late fall or winter. So unless you have a friend or 2 with you - its not going to work.
There is also a slight "art" to propper dropping on the reef/ledge - otherwise you do you dive in sand.
For the cost of the diving - trips are $60 at Jupiter Dive Center, and about $50 w/ U/W Explorers - given the low costs (I have a 31' open fisherman and I can't turn the keys for $50 - 60) and the fact that you will have a new diver, unacustomed to drift diving, I think its a bad idea to dive from your own boat - this trip.
Boynton has better reefs, slightly easier diving - Jupiter I think is superb for big animal sightings, and I love the diving there - think its the best in FL - but I would not recommend Jupiter for a real new diver - deeper, stronger currents.