Don't get me wrong here, I think what we have all built or are contemplating building here are simply fantastic, what I am trying to say is that the frame for his build probably did not cost that much, yes he has a whole lot of bells and whistles added but at the core it's just an L-shape steel box frame and I would wager that it could be done a lot cheaper than his and still get the results as the design is sound and shows that mass is important - his bed must weigh a fair bit alone.
:)