If it were me, I would look very hard at a Hobie wave. relatively inexpensive new, pretty bullet proof, won't turtle, easy to tack and sail, not intimidating to most women.
If at some point your daughters want more a Mystere 4.3 or Dart 18 if you can find one would be a great choice. the Mystere is inexpensive new and has all the gofast toys of a bigger boat, just in a 14 ft package.


Good Luck
Eric Anderson