That's a very cool project! I am a hot-air balloon pilot and I love everything that flies with the lighter-than-air principle.
One limitation I could see for your business model is that airships can only be flown in a controlled direction at rather slow wind speeds. That is because they just have such a huge attack surface and the motors have limited thrust.
Did you do an estimate how many days per year you could fly your vehicle in a given economic area of interest? I fly balloons in Switzerland and I think you can get at most 100 days of good flight conditions a year. But yeah, with some climate data and your operational limitations you can probably estimate how many days you get in a given area...
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