The Home Ship - Departure
Naturally it's going to take some time to answer all the questions, however...
Things that can be answered by a quick and routine check of known references (25th century Google) are free, not one of your 3 questions.
So, about interstellar marketing in the region of space you are headed to:
You will be headed past Calderada, capital of the Calderada sector and a gateway to the Trailing Frontier. Calderada is an Earthlike world with a geologically recent (5-10 million years ago) major asteroid impact. The world’s ecosystem is still recovering, and the planet has very high vulcanism and tectonic activity. Sulfur dioxide and other pollutants make the air not toxic but unhealthful over much of the planet. Colonization has been limited to areas where the air is cleanest. This means a very small area of the planet is prime colonization real estate, but on the other hand, planets are very big. "Very Small Area" can mean something the size of Mexico.
This region of Calderada happens to be very favorable for crops as well as humans. So it is a major food growing region for the frontier, and an important source of coffee, the magical bean that makes humans function. It has become an important world for food processing and distribution. Big companies in this line of work have offices here. This makes it one of the few areas where you could quickly sell your Crosser food in bulk. Elsewhere, you would have to find smaller retailers and distributors.
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Lilana herself has a sensor skill. Useful for a documentary maker.
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The last leg of the trip is off the Main Line, to one of the many "ignored" systems. Beyond the region around Sol, there are so many stars and planets that people haven't bothered with most. If it has a strategic location, or an important resource, or a habitable planet, sure, otherwise there are a zillion gas giants, more asteroids, and all kinds of things beyond measure. This is one of those ignorable systems. Unless it has something interesting, just another dead gray dust covered world, or just another big cloudy gas giant, is boring.
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And we go through questions, one by one...
Abe researches ghost ships. There is an entire interest group/cult that asks these same questions, and they have asked them for a long time. Sure enough, some ships are known to have general routes or areas of travel. Still no proven purposes, just speculations. One ship jumps out at him, because it conflicts with something they learned recently. And because it's usual hangouts seem rather close to your destination.
The Agricultural Ship Caledonia, according to its crew, was the last remaining ship of its class. But that's not exactly true. Its sister ship Patagonia is operating... well.. past Caldera. As a ghost ship, meaning it's not engaging in known trade. Just coming and going doing it's own thing, and nobody really knows what it is up to.
Naturally, for "sinister purposes", an Agricultural Ship is a bizarre choice. It's old and slow, converted from a long obsolete attack carrier. Now it carries pods with agricultural habitats. It's huge, slow and obvious, and most of its systems are very old.
Of course there is speculation about what it does: smuggling and intelligence gathering are pretty much out. The leading consensus is that this ship is a kind of traveling resort for the super-rich of the frontier, who want to experience an Earthlike environment, so instead of making the long trip back to Earth, they have some Earth brought to them.
There's still debate, of course.