They’ve got an interesting approach, but they’re using helium to get it off the ground, and there’s a very limited supply on this planet. (And yes, they could use hydrogen, but that would add a whole raft of other safety/engineering issues, cf. Hindenberg.)
It might be worth getting in touch with Altaeros, if only to help avoid you getting hit with patent claims in future, as well as so they can see that there’s some prior art in Europe.
Since they’re part funded by MIT, and the original founder was working at SpaceX, there’s the possibility of alternative funding sources for Kiderwind. Would the ESA be interested?