Great Eri. Now I'm thinking on the engineering aspects of a flying island and how to make one livable.

Let's see.....
Perhaps a good airtight helium zeppelin, shaped to fit the purpose, would serve as the base of the structure.
I imagine it'd need small engines to help it maneuver easily, yet some well disguised attachments to the thing to help create drag, and to stop it from moving around constantly.
There could be weights at the bottom (perhaps a hidden gondola?) within the ship. The flight path of the island could be managed here, perhaps with crew/emergency living quarters (emergency being tough weather)
Coat the whole bottom of the ship with fake dirt and rock; make a container on top of the thing to hold a 4-5 foot deep environs of your choice, perhaps a pool to serve as a miniature lake or ocean; some small shanty for the guests to live in (suitably constructed to blend in with the created environment), and you have a floating island suitable for living on. Oh, and let's not forget the bar (keep the pilots away).

I don't think the thing could stay up in the air indefinitely , but It might serve as a luxury cruise skyboat of some kind. It'd probably have to go around pre-charted areas with exceptionally good weather and air currents to ensure safety, so no Atlantic cruises. Still, interesting food for thought.

....And it has just now occurred to me that you might find this suitable for one of your sci-fi stories. I DEMAND CREDIT