Early on, I wanted a FAS, so I built up my reputation with a small pocket of systems with quite a number of Fed factions, and started doing missions. I was very low-ranked trade wise, and the best paying missions were rated for Deadly and Elite, so I was getting chased a lot (pre Horizons/Mac version) by some nasty pirates so I always used fighters/ships that could fight to do missions and small cargo runs related to said missions.
I've never owned a Adder or a Hauler, or any of those cargo haulers because I was too busy getting chased by mission generated NPCs and I wanted the ability to fight if I did something stupid and couldn't escape.
I've always had my eye on Fed ships, all the way to the Corvette, because I have been fighter-oriented since I started this game obviously. I've tried hauling bovine droppings once (Sothis?) and hated it. That and the missions I was running were giving me three things: credits, rank, and materials and I saw this as a much better solution to achieving my goal.
Once I got to the Python, things became a bit easier. More rank/credits/mats per session, and I was discovering/bookmarking choice systems that I used for buying stuff and ranking up with for even more missions. I never saw the 'rank grind' others see as I was too busy discovering new systems, and gathering credits/materials. For me, this helped immensely.
Long story short, I have my Corvette. Love it. For bounty hunting it has the same jump range as the FDL, but kills a whole bunch quicker, which makes it my bounty hunting credit machine. I also have the rank for the Cutter, but I have not bought one as I see no immediate use for one. Simply, I don't do bulk hauling/trading. It (like mining) just doesn't interest me, and I see no other use for the ship otherwise. But then I've had the same problem with all of the Imperial ships, in that I try them out, but quickly sell them as there are better choices for how I play this game.
Maybe if I had taken to cargo hauling and had already accumulated the credits and materials I would have viewed the rank missions in an entirely different light.
Best of luck with all of this.