I think I might see a problem with the civilian missile turrets.
For example, VHF's could suddenly equip them, but the missile turrets don't use energy as such, and it's rather hard to believe that such a small ship (at least compared to cruisers and whatnot) could carry almost infinite amounts of missiles.
Apart from that I can't really see anything wrong with the idea as such. :)
Beware the Lazy Invasion of the Lonely Mudcrab of Doom! Lady Arwen's Realm