I will add to the "start at home" frenzy and add another reason for it.Whatever you do, make sure that she completes her e-learning and pool dives before you go somewhere warm and far away. That way, she will do her 4 open water dives in 2 days and have time for a few more. Make sure that she signs up with an agency that corresponds with that of the shop you pick for her checkout dives.
I taught for two different shops in Colorado, where about 80% of our students leave the state and do their OW dives in a resort setting. In both shops, we all did a very through job of working with the students. They did all the confined water requirements, and had plenty of time working in a pool that was idea for the purpose.
I myself was certified completely in a resort setting. I would guess that the maximum depth of the pool was about 5 feet, making it impossible to do some of the confined water requirements. We only spent two hours in that pool. I didn't know any better then, so I didn't realize how many requirements were skipped in that one pool session. I have since observed instructors working in pool sessions in resort areas, and they are very limited in what they can do because most resort areas do not have pools with deep ends. Then we did the OW dives, and for the most part I cannot complain about them. In retrospect, they were better dive experiences than students who do their OW dives in Colorado typically get in our shallow, cold, murky water.
So look for the best of both worlds. Find a local shop that can do thorough confined water sessions and then go to a compatible shop in a pool area for the actual certification dives.