I'm much in the same situation as op.
Working as an airline pilot I'm away a lot, so playing is limited to when I'm home after kids are in bed.
I bought Elite beta and started to play in summer 2014.
The progress was reasonable in the early stages but for the last year I've been stuck at the Python level.
I have tried to enjoy it and haven't been doing too much grinding. Made it a-rated and upgraded with most engineers.
But from here it seems to take unreasonably too much time to advance to bigger ships, without putting in weeks of grinding only!
And with limited time to play, I don't know if it's worth it.
I have, of course missed all Quince, Rhea and other shortcuts that's been available.
How is that even possible?
If I fit my Python with 280 cargo slots and find a good loop route from eddb.io, I can maybe make 1.4 mcr per roundtrip. Four round trips in an hour gives me 5 millions.
So in order to get 150 million, I would need to grind for 30 hours. Playing a couple of hours a couple of evenings per week, would take me months to get there.
Months of doing boring grinding, instead of enjoying the game, doing different missions, joining with factions, bounty hunting etc.
I have chosen the latter, which is probably one reason that I haven't advanced further. It's a shame Elite isn't rewarding that kind of play enough.
How is that even possible?
Any hints would be appreciated.
Then you have found something I haven't even been close to.
I have never managed more than 5-6 m per hour from trading. On rare occasions I have been close to that with bounty hunting.
According to the right side menu I have a total play time of 6 weeks. That's about 1000 hours. Some of that is beta testing of course. Trade rank is Entrepreneur and combat rank is Dangerous.
Don't you think almost 3 years and 1000 hours of varied playing (not grinding) should be sufficient for more than a Python?
I've been playing just a little over a year now, have acquired every ship, including the Cutter and the Corvette.
I've not used "exploits", or even cheesy get-rich-quick schemes (Quince/Rhea/Sothis/Ceos/Robigo), massacre mission stacks, skimmers, or even mode-switching.
I started my career, like everyone else*, in a Sidewinder with 1000 credits to my name.
I tried a few missions at first, but found out quickly that NPC's were unforgiving, and fuel was a valuable commodity, so I shifted my focus from mission-running to something else:
Scavenging.
Planet surfaces are littered with lost cargo, caches of goodies, wrecked ships and automated mining facilities.
And I found out quickly too that certain cargo items (Platinum, Jateite, Moissanite and Taaffeite) were not only extremely valuable, but reasonably easy to find.
With my massive 2 tons of cargo space, it didn't take too many full loads of Taaffeite to rack up enough credits for a major upgrade - an Adder with 12 tons of cargo space.
Now I didn't have to be quite so selective, and I could load up on goodies like these found laying around on planets. A couple of trips, at an average of 200,000 cr credits, and I was looking at my next upgrade, an 80 ton hauling Keelback. Now we're talking. Now I could actually start taking on some missions, and I did - quite a few of them, but it wasn't enough, and I discovered Rare Goods - Eranin Pearl Whiskey was the first I found, and though the quantity was limited (8), it didn't take me long to realize the further I hauled these the more they were worth - and before long, I'd established a nice little trading loop of my own - hauling Eranin Pearl Whiskey out to Witchhaul to trade for Kobe Beef, I was was turning quite a good bit of credits, all the way up to... the first time I decided to try my hand at a Community Goal. It just happened to be Moira.
The Moria CG had a glitch, and in the end, paid out far more than it should have. But I put in the work with my trusty Keelback, and had worked myself all the way up to 22 million credits by this time. I kept eyeballing a Type-7, thinking I could afford it, use it for the CG, sell it after, make back my credits along with the CG payout - I'd worked myself into the Top 50% and the payout was more than the depreciation of the Type-7, so I'd come out ahead... and then it was over, and the payout was skewed, and I wound up making a couple hundred million credits instead. I bought myself a couple of ships - a Fer de Lance and an Orca.
At the time, we didn't have passenger missions, so the Orca didn't have any special purpose, but I loved the look of it, and I found it to make a more than suitable short-to-mid range hauler, weighing in at 138 tons of cargo, and I started expanding my search for rare goods, finding more of them, and longer distances, and I kept making pretty good money with it. My Type-7 hauled more, but it wasn't as much fun to fly and always seemed to attract NPC's - my Orca not so much.
So I kept flying around in circles, buying and selling Rare Goods, and turning up at CG's, though none have paid out like Moira. They still paid out though, and I always made money on them. I also started experimenting with more combat-related stuff, and found the Fer de Lance more that suited for combat missions, and I'd take those when the payouts looked good and I was weary of hauling freight. After a time and growing my credit balance, I picked up a mining ship - a Federal Dropship and gave a go at mining for a while. It wasn't bad, and I made pretty good credits with a bit less risk than hauling rare goods around. Then Passenger missions happened, as did an upgrade to the Fuel Tank of the Orca, and I switched gears, hauling passengers - making credits and rank, and was able to keep some cargo space for some rare goods as well, and things were good.
And then, some time later, Ram Tah introduced us to the Guardian Ruins - and the payout then, 201 million was far too tempting, so I started making the effort, and despite being bugged as can be, I was able to complete this twice, though it was a terrible pain to complete, but it did net me enough to buy an Anaconda and Outfit it, and it quickly became my choice ship for bounty hunting, which was now a pretty profitable venture for me.
Now fast-forward to today - I bank a little over a billion credits, have another 3.5 or so billion in assets (at least one of every ship, two or three of some), and am largely "free" from the sense of "need" to do any specific thing and able to simply do whatever entertains me, which at the moment, is a mid-range trip (around 6500 Ly) out of the bubble.
*Except for those who paid a whole lot more, a whole lot sooner than I and got to start with an Eagle instead.