Wonder how far the Houses actually board a Merc unit's vessels. Yeah keeping the thing running might be pretty hard, can't just schedule a stop at a ship yard for a maintenance stop when your trying to hold onto a warship, even if it is barely armed.
Was always curious, the Blue Star's captured and were allowed to keep their warship. Dragoons had theirs, of course no House had a navy to even attempt a take away, but 1SW era, everyone had a warship navy.
I figure a Tracker won't massively destabilize a long running campaign, I even toyed with a Vigilant, but that is much more a warship and I can easily see a House saying "Mine".