Well, It's meant to be bigger than a spacefighter or single-person shuttle, but not as big as a mothership as to provide quick response in whatever planet or star system it's functioning in. Built for transporting officers from planet to planet or space stations.
For the build would like to put two or at least jails. The mismatch thing is that under the small piece reading "Police" there's an empty 1x2 plate space, and it's one plate taler than the blue piece behind it
The tan one? It's a moderately armed gunship in which bounty hunters travel and serves as a temporary base, kinda like a motorhome. It started out as Samus's ship from SuperMetroid, but gave it a "Lego Space" overhaul with small rovers, a roof that separates as a smallflying craft and a numerous crew. The orange one was also inspired in the Prime 3 ship, works more like the galactic version of a white van. They need a bit of interior detail before they are fully finished