I know it wouldn't be easy to get any of that dunesland for development, but there sure is hundres of kilometres of it. On the other hand, lots and lots of condos are currently being built on Hel Peninsula (Voytek, you know the place), so you never know...
Point Rich makes is not that far off, really. Many will come back and many will have started playing while in UK. They are some half a million there already.
Also more courses being built. Here in the north, within 1 hour from Gdansk there are already 4 courses and project I'm on will the fifth. Also, some city driving ranges are being built.