Saw Cyclemorph at Interbike couple years back. A bit complex for the average rider; it takes longer than 5 minutes to originally assemble all these parts plus you haveto 'buy' some things not in the kit; by the time you get done, you still don't have a real tandem.
In that price range folks will buy a wally-mart product which is another issue altogether.
While your product has merit, it has very limited appeal. Don't quit you day job!