If you could get to Greece
1 week before hubby and kids
, there are several RYA accredited schools there where you could do the dayskipper course (non-tidal).
upside: offset cost of course against cost of hiring a skipper (they are always smelly and obnoxious -JOKE!)
1 kid free week.
Convertible to ICC
(I think) so in future you can charter anywhere.
downside: hmm, can't think of anything...