I can't see the pictures well enough to be definitive, but I'd guess at least a Bronze at WF. Scratchbuilding is always looked upon very favorably. (Assuming a competent paint job, of course.)
There are tons of Star Trek and Star Wars models every year, so anything you can do to make your's stand out from the crowd really helps. I don't think I've ever seen this sort of thing in the contest before.
How big is it? Size definitely helps, as long as it's not too big.
(You can read whatever you want into that last sentence... )
-JC