For me the quickest way to make money is to farm volcano and sell off any weapons that aren't rusted. In G rank they go for several thousand a piece. You could make 10000+ in a few minutes worth of farming.
I'd actually say a large chunk of my money and resources come from selling/converting leftover ores I got on volcano charm runs. At least I got SOMETHING out of that shit, certainly never got any good charms.
At 250 hours and counting, picking up gunning has kept my drive to play as strong as ever. I still find pierce HBG to be the most fun and satisfying but I finally got to try out status LBG last night. The Master Kettleblower is just absurd, it can easly sleep monsters 4 times and paralyze 5+, but most importantly it can do it so reliably I can call it out in voice chat and let people know an opening is coming up. I don't even use up my poison ammo because it only takes a couple of shots to poison anything. I was thinking of making a paralyze SnS as a support weapon but this thing just embarrasses any other weapon that thinks it's good at causing status effects.
Downside of course is it basically does nothing else. It can crap out normal 2 and normal 3 pretty well, but it probably does a third of the damage my Eclipse Gambit outputs with those shots and it's not even set up to use those properly.
Abyssal Lagi was the last monster I had yet to kill and I finally got to do that last night. It was about as unpleasant as I expected, thing doesn't stand still and his charge move is just stupid. However after that bullshit I'm still wondering how I can keep running into people wearing his entire gear set who fail utterly at comparatively easy monsters like Rathian. Yesterday was the second time this happened, saw a guy with the GS and gear set from A.Lagi who couldn't even get the tail off Pink Rathian...and I slept her 3 times. Paralyzed 4.