It would seem to me that many Inquisitors would value their independence, as it is, and not have to let too many external elements interfere with their missions. These men and women can often acquire almost anything, but thy often seem to have to make nice with some types, lest they end up stranded before they even start. Could an established Inquisitor (so Rank 9+) playing in Ascension, acquire a starship? Rank 1 Rogue Traders are gifted a whole ship, right at the beginning, so you would think that an Inquisitor could pull a few strings, and acquire one for his own use, lest his movements and actions be observed by others.
If one would attempt it, would it be an Influence test (minus the ship's Point total) to get it for a whole adventure (on loan from Battlefleet Calixis?) or minus the ship's Point total + 20 for permanent ownership? In that case, it would seem rather fair. The Sabre is an average good ship, at 50 pts. So Influence -50 would be a tough check, but doable, especially if you could call in a favor from the Lord Sector, while Inf -70 to own it outright, would likely be limited to Lords, but again, doable. What's the verdict, though?