I think it all depends how the weather is the rest of this year. It's cold right now, but not like freezing or snowing so they'll probably get a lot more work done than they thought they would this winter. I'm not even worried about spring or summer. The only thing that would stop them during those times are like extreme heat (but that hasn't stopped construction really before). Anyways, my guess would be, judging by the progress now, soft opening in mid March offical opening in April. The work on Hogsmeade has been pretty good. The only thing that really needs to get going is the castle, and the interior of everything.