It is true that SIAF's estimates were optimistic, but the scale of this project is so massive -- from creating land (or "reclaiming" land), to building all necessary (and extensive) infrastructure, then forming and constructing the massive tanks and erecting the buildings -- that it would challenge their ability to predict correctly, in my opinion. Overall, the company has accomplished a remarkable amount of work.
Normally, it is likely that a project such as the megafarm would only be built by a huge civil engineering firm, such as Bechtel or Skanska. This project is quite a step up from the demonstration farms that SIAF has built.
I'll be happy if the tanks are stocked by the end of March 2016.