Well, this being my very beginnings running this system, of course, I have already messed with it some to make it more friendly to a smallish game of 6 players with 1-2 units each. I have a Nef for my Norwegians that I built with a bucket of weaponry, and when you really look at the scale of a GW Tank gun compared to a normal 25 or 28mm, it is about an 18" gun...so I managed to have built a 'Nef with a heavy ground assault gun, a Medium up top for ship to ship, and two lights. So, I just took the step of limiting ammo in this game. They have no shells for the big gun, and only one shot with the medium. Otherwise, this game as laid out would take about 2 turns for the 'Nef at full armament.
What size of a table do you normally play on? I have a 4'x6' that I play on at home (standard size for GW games, which is where I cut my teeth, and still play faithfully), but V&S&F seems to want a larger table...