Have a incursion set up..

If you are mainly focusing on Frig PvP you can easily affford it with only a couple of ours here and there with incursions

I can advice exploration.

Get a covop frigate (either the SoE one, or any of the T2 covop ones) and go scan down sites, Data & Relic, and hack/analyze away. It's short & can be enjoyable to see what you get.

Income can vary alot, depending on what you get, but even in short stints, it should be profitable enough to support frigate PvP (and cruiser variant)

Do market trading.

You don't have to leave Jita, and the skills required to get your tax rates and transaction fees down are relatively quick to train to a suitable level. You can just park a secondary character in a market hub to do it (it can even be on the same account as your 'main.')

I know a guy who plexes his account using 2 billion in working capital. Really not that much.

I have done some testing in CVA space, and I guess I was just very unlucky. I min-maxed a few skills with a single PLEX to even allow me to scan down 10/10's (albeit with manual drone fidgeting for the last 2%), but it was very hit-miss - I mean, I did not expect an isk fountain - but as a time sink, a single high end anom would have gotten about 10x the isk/h that I managed in a weel long test, again, it's all tied to RNG, but I'm trying to shoot for less time/isk deviation.

Technically, running C1 anoms would get better averages, at least from numbers I have seen, the main danger being of course players, not NPC ships.

= Leafar NightfallAlso, travelling around with hundreds of millions worth of isk is thrilling as hell

We have system in null just for isk making. Clone jump there, do some ratting to make isk and then jump back. Rinse and repeat as necessary.

Gets on the bat-phone to his locater agent

OK, contrary to what the goons will tell you, there is zero chance of making 75M / hour in missions.

TL;DR

For the few of you that do NOT have multiple accounts, and usually get on for only say, 1 hour sessions at random (multiple) times during the day, what activities do you focus on to generate the ISK other then PLEX injections?

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Don't get me wrong, I have a good grasp of what to do, I'm asking this here to see if anyone is willing to let go some more "secret" tips then those I can already find.

Premise: Single account, future possible limited play time, weird hours. Possible inability to grind isk in multi-hour sessions.
Current idea: Join RVB, and keep a toon in mostly cheap frigs. Short roams, get blown up lots.

Problem: The ISK making angle (if not PLEX'ing) and trying to do something "outside the box".
It's pointless (for me), finding an activity that can pay 500+ million an hour as long as you invest 10 hours in it to average that amount (wormholes for instance, when you factor in ship losses), when I'd rather get 10-50 million an hour as long as the payout is consistent and can do it in very short sessions, even if higher risk.

For the few of you that do NOT have multiple accounts, and usually get on for only say, 1 hour sessions at random (multiple) times during the day, what activities do you focus on to generate the ISK other then PLEX injections?

Buy plex and cutout the grind.

For the few of you that do NOT have multiple accounts, and usually get on for only say, 1 hour sessions at random (multiple) times during the day, what activities do you focus on to generate the ISK other then PLEX injections?

I'd second trading -- it doesn't take much time, and you can make a LOT of money once you learn the market prices a bit better and have high enough trade skills to lower cost and increase order volumes and the like.

Level 4s if you have the skills will get you decent ISK, too, but takes a bit more time.

What's everyone else in CVA doing? Anoms in Providence?

You failed to even read the TL;DR portion of the OP:

OK, contrary to what the goons will tell you, there is zero chance of making 75M / hour in missions.

Trading takes a big stake to start, and given the way you are talking, I don't think you have that stake.

Does anyone here "farm" L4's over and over after DT without completing them? Is that still possible or has CCP changed it?