Well, first we have to ask, how much is 1 metal, anyways?
As we don't seem to have much of an actual scale, and the fact that there are apparently nukes capable of destroying entire galaxies instantly (though, I picture the Mk3 Nuke as some kind of supernova device, where the supernova travels through the wormholes, obliterating everything in its' path. Supported by, uh, certain things involving hybrids, too), as well as ships like the Mothership which are considered overkill when used on an entire galaxy...
Hm. How large would these ships actually be, anyways? I assume nothing is to-scale, of course (I would assume that a starship is at least an order of magnitude (or even two) larger than a fighter, for example)...