ahh good to hear you went down the same route! I think it's the way to go really. I can still see it being fun to trade once you've got a big ship, but it's about getting there, for me, that is the incentive.
Then I'd probably go about exploring and what not - as I'd then have a ship that is faster as well, and can do bounty hunts also.
Monetary-wise, I know this may be the wrong way around, but gameplay-wise, I think it's the right way.
Do you think rares are worth the bother then? Sounds interesting, but I'm not sure worth bothering unless you've got a big trade route already that takes you some distance...and even then, I'm not sure the money involved sounds worth it...perhaps it is! haha but well, just seems like clogging up space for your other items that you'd be trading every system, rather than wait x systems' time to be able to sell your rares for what would, at that point, probably be a loss compared to your other trades...
well, let's do the math
profit from a ton of rares is around 15 000 per ton on 120 ly distance.
let's assume you find a very very good bulk trade route (without slave trading), which brings you 2000 profit/ton overall a-b-a.
you have an adder. in a pure trading outfit that's 24 tons of cargo. in a rare trader outfit (fuelscoop, scanner) you'll have 12.
profit of a rare tour will be 12*16 000 = 192 000. profit of a bulk tour will be 24 * 2000 = 48 000.
an adder can jump above 20 ly fully laden. to go 120 ly, you will need 7-8 jumps (you can't take a straight line).
let's assume, you take the same time to stations and for docking, whether you trade bulk or rares. than the difference will be the time you need for 6-7 jumps. that is 5 minutes +/-
you need to do 4 bulk tours for one rare tour - and a single tour (undocking, jumping, approach to station, docking - and back!) will already take as much time as those jumps in your adder.
(of course, those are "best cases" - but i think the relation is right).
so - don't combine bulktrading and rare trading, go for rares only. but even later you can use rares to buff your profits, if you don't stop more often then 10-15 times before selling the rares at a good profit.