For anyone that cares (this may shatter the narrative for some of you) but there is no massive time requirement or year long grind required to earn enough CR to afford one of the big ships. Apparently, this doesn't even require any indepth understanding of the BGS, exploits, mission board flipping, odd ball system, or some other scheme to achieve.
In fact, you can pretty much whatever you want and do something different every play session.
You can completely disregard your balance and just go from system to system, taking whatever missions pay well and look interesting. Go mining, or explore for a few weeks even, doesn'y matter.
The key is missions and CGs. I'll have better data going forward, but I've earned twice as much money from missions and CGs as I have from everything else combined. Even factoring in the first two months where I just tooled around crashing into things, my average income has been a little over $1.3 million CR per hour, and 2/3 of that from things other than exploration, BH, Combat Vouchers, trading or mining.
I've no doubt that my average over the last six months will be much higher than that, but even at that rate I could have an Anaconda in a little over a month for one to two hours per day of doing whatever looks good at the moment (if I'm not out in the black for a couple of months, this is how I play. I may stay in a system for a few days, but then I SQUIRREL!
It took me over a year to get into an Anaconda - that was in the times, when missions pay was crap, credits were quite hard to come by... For me Bounty hunting was the best cr/hour and fun way of credit making...
That is true, that the bigger the ship, the easier task it is to get into high paying tiers on a CG.
In the beginning, I did missions only for rank, the cash was terrible - it has very much improved lately.
When powerplay was implemented, I used it for stable 50milion income every week, but staying on rank 5 was (and still probably is) a chore by itself... This incredible merit grind put me off Powerplay. I stayed on rank 5 for about 10 weeks in a row max.
When collector limpets made it into the game, I tried mining in Anaconda. It was and still is one of my very favourite activities - very relaxing. If you have wingmates, then mining in a RES combined with SLF and bounty hunting at the same time is very engaging and fun... These days I often outfit my Corvette for mining - the cargo capacity is way better then Anacondas...
I still find stacking 3 massacre missions and CZ fighting very profitable and my favourite activity for gaming session. It requires good relationship with the factions though, so some time investment before it becomes profitable (sometimes the war is over by the time I build it up to allied)
Karlos