First .. credentials, we have a family with 2 daughters who have sailed extensively since birth and one has an Atlantic crossing
under her belt. We have had our boat for 25 years with most of those years pre kids
. The kids always love time on the boat and absolutely blossom after a month or two on board.
First .. boats are cheaper in the USA
and generally the cost of cruising fit out is way better.
Second .. boat age means very little... prior to embarking on any major expedition you would be doing a near complete strip down and rebuid on the boat. The only original stuff on our boat is the mast
... everything else from rigging
, heads, engine
, fridges etc etc are renewed.
Third quality of the original hull
is critical and that is where a good surveyor
is your friend. Brand names also build poor quality hulls or inadequate hulls for ocean cruising. Often a lesser known boat can offer outstanding value.
Fourth ... costs seem to go up dramatically after about 40ft and this may impact your cruising budget.
Fifth ... you will motor
much more than you expect and a low hours good condition engine
or better still a new engine is highly desireable.
Finally ... If you want to keep your family happy remember its not camping and it needs to be a comfortable family home with good facilities.
If your willing to learn and are a little bit handy and prepared to do your own work
I expect you will find/ refurb
a boat within your budget.
I find much of the opinion on the various boards less helpful and suggest you meet a few experienced locals to bounce ideas off... but expect 180 degree differences in opinions.
Best wishes for your adventure.