Persoanlly I would stay being the super yacht engineer and not jack it in.
Do your PPL where ever you like Inverness and Prestwick have the best wx in Scotland for intensive courses. And first off go to get a class one medical from Gatwick before spending any money on anything else.
After you do that get one of the distance learning packages Oxford, Bristol it makes no odds, which ever one is easy to get to from you current location.
Study them while you are working on your superyacht.
Wait a year and sit the first set of exams see what the market is like.
If it is utterly crap still sit the next lot after another year.
Then come back on here and see what WWW is saying and ask again.
It really is not worth taking things to far until we find out how things play out over the next 2-3 years. Most important thing is timing as well as money in your pocket. Work another couple of years while you start training then when you do start flying you will have a finacial buffer to get you through the first couple of years