I’d say that it sounds like you are describing Neilson
You might not get the best biking but you will get good biking. But you’ll also get good company water sports and an opportunity just to chill. From memory the beach clubs are more flexible than say a biking holiday as even if you did water sports all day you could still meet up with your wife for lunch
I think if your son buys into the idea then it’ll be a winner.
Really exciting would be a 2 week holiday, first week beach club second week flotilla, but that may well stretch the budget. They’ll teach you to sail the yacht from scratch in week 1. Its a good time to go a bit wild for a holiday as your son is post gcses and has a long holiday?