It never works if both don't WANT it. We have seen many couples stop cruising with
both resentlful after ONE...usually the wife...conceded to let the cruise happen...then was unhappy "camping" for the next year or two....causing other spouse to resent the attitude.
Don't do it unless she really wants to try it....Other alternatives exist.
1. You go sailing on a smaller boat and invite her to JOIN you at nice destinations.
2. You go on charters in the Caribe and she falls in love with the idea of cruising.
3. You wait till the kids get out of school...divorce the wife and find a 22 year old who wants to sail!