Considering it's a German company..that would mean that 50% were coming HERE!
But there's no US distributor....click on "where to buy"
I'm thinking...at the right high-end, still-water resort (Eagle River, Tahoe-ey places, maybe Caribbean harbors/lagoons. I don't think it looks "sea"worthy), you could easily get about $100-200 an hour per unit in rental fees (maybe $75 per 1/2 hour, maybe even more when you think of what they charge for waverider rentals/parasailing!). That's $4000-8000 per week, per unit...maybe more!
I'd be like Paul Rudd in "Saving Sarah Marshall", but high-tech.
the thing is it is an amazingly simple concept. JetSki impeller a big light hose and a couple of nozzles. they picked a car up on mythbusters using fire hoses same concept. It's one of those things where you go "why didn't I think of that!"