Is there really a market for these things?

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In case you've been waiting, your wait is over, floating hot tubs have finally hit the market. You just fill them with water and then heat the water to 100% with a wood stove. You're then ready for a leisurely sail, powered by either an electric or gasoline outboard, with your only worry being waves greater than 1 foot or the wakes of passing motorboats.    

Granted, they're built in the Netherlands and maybe boating is a bit different over there, but these Hot Tugs seem like they would have limited appeal, especially considering their price of between $11,600 to $21,400, and that's not including the cost to ship them shipped from Rotterdam.

I'm guessing these things are a lot better in theory than in practice.