It may be nice that they do have prototypes, but so does Moller. And Aptera. It appears they are still one-offs; the question is are they seriously testing and developing with these mules or are they merely for the dog and pony show? I would be somewhat less skeptical if I saw tooled parts- especially for the drivetrain- rather than all the hand-made/borrowed stuff.
Even so- maybe it's just me- if I'd be doing it, I'd have the product pretty much nailed down BEFORE the hypefest and the big production plans.
I almost got on with such an outfit once- anyone heard of Excelsior-Henderson motorcycles? They had all the same warning flags- a crap prototype, and all the efforts of the founders seemed to be geared towards enriching themselves and building a palacial facility, of course at taxpayer expense. PREDICTABLY it FAILED.