How about free? On the condition that you serve as a tester? If you're up for it, I'd be happy to.
I have implemented many changes to the game, besides a general map of the islands where you can navigate in your boat, go fishing, and visit many islands. But I don't know if there will be lag problem, because of its big size.
So it would be good to have someone who knows the game very well and is able to advance quickly, I would give him keys privately to activate the content I want to review.
If anyone is interested, let me know here, or privately if you prefer.