All these Chinese titanium copy of Brompton or Montague are very low volume production, these guys do not try to reach a low price for them, its not comparable to what Helix wants to do i.e.a much bigger volume cheap titanium bike.
Production price depends of the production quantities.that will depend of the sales.
And it is impossible to predict what the sales will be because nobody knows how good or how bad Helix is: does it ride well, is it comfortable, is it reliable...
Now, honestly, with such a complex design as Helix and the lack of experience of Peter, the chance of being technically first time right seems to me very low !