And remember to do trade and criminal at the same time. Do a bit of smuggling with every normal trade route! It just means that you REALLY have to play the minigame of keeping the crew pacified or content. And a Rogue Trader would have, you know, incentive to do so, because of the absurd amounts of money they'd be making.
Question is, though... assuming you did, yaknow, boring trade/smuggling routes and focused on getting enough of these ships, actually just BUYING them (which should eventually be possible if you go to a forge world with a huge profit factor, get some connections, and tell them, 'I am going to be regularly returning here for refit and repair and to buy a ship exactly like this one, possibly tradind in looted prizes for some of the value', to get a gaggle of them to get profit factor into the mid hundreds (and, with missiles on a keel mount, which you could hypothetically get some nuclear tipped or seeking missiles or nuclear tipped seeking missiles, and fighters and bombers and an active CAP at all times, these ships should be really really good at the interlocking fields of fire thing...), how would it work? How would starting with two of these ships with the 70 sp / 20 pf work? Just delaying the bigger part of adventuring until you are absurdly wealthy with a traditional way, and have a few cruisers to go adventuring with?