If your claim is that there is a market for luxury air yachts that are extremely expensive to maintain, require a huge crew 10x larger than a yacht, are 10x "smaller" than a yacht, and can't remain stationary somewhere nor from A to B, but instead only can go "wherever the wind goes", then I don't believe you.

Feel free to prove me wrong. But the amount of yachts in Montecarlo during the F1 grand prix suggests that a significant market of the luxury yacht market does care very much about going from A to B, and about being able to remain stationary in their yacht somewhere.

So not being able to go from A to B and having to put your "yacht" inside a crappy hangar without views to be able to stay at one particular place pretty much kill the idea.