Used to be pretty good profit in lower cat mayhems if you had the skill level, and 20k woulda worked nicely.
Now i guess mining is the easiest way to grow that "quickly" if you have the patience. L finder, adj/sga extractor, good refiner and go. Less ped for cycle needed so feel free to invest in a nice toy, dont bother with unl finders mostly tho.
I think healing service would be faster, but even more boring, unless you have a few audio books youd wanted to catch up on anyway. Could try that new buffing fap. Would need to calculate but maybe some people like 10% reload even if they dont need healing and just pay cuz its cheaper than the buff pill pr sth? Prolly get divine, perf ares, adj resto, mod2600 for 20k? Prolly wont be enough for imp fap but if it was, thatd prolly make you good money i think.
Ofc you could just invest in passive things like cld, player funds, renting out stuff you bought with your 20k etc.
Hunting wise i dont think there are such opportunities on caly (read - I dont know any).
Depending on your skill tho, there are good ones on other planets. Get ghost, cheap fap, cheap gun and have stuff left over to cycle, farm for ozpyn/baringer yourself? Thats decent dps i guess, then check out those armor/plate upgrade chains and see if you cant get in on looting those parts? Not sure if gorgon is still good but i managed to offset tt losses with mu there not toooo long ago. Maybe newer chains are even better rn. Ofc check out mayhem and all events by caly and other planetpartners, if it looks good, go for it. Ususally much better to commit to those and play/hunt more during those 2 weeks than to randonly shoot troxies or sth stupid for 4 weeks. 20k wont get you high eff, sadly, so its a little harder for us "poor" sods, compared to this crowd, to make ends meet. (But what else is new
)
Space prolly is more expensive than 20k.
Crafting definetly is, thatll be gone thrice before you manage to get your feet under you (or im an idiot, always a possibility)
I guess unless you really focus, like just repair tools or just 1 weapon or sth. I dunno, crafting is too confusing for me.
Taming? Nah. beauty? Nah. Trading? Yes but if you ask like this, prolly not for you? Takes intense ingame knowledge or some serious salesmanship i guess.
I guess thats it? Aaand im at work, great use of my commute, succesfully avoided working! Yay!