So,one of my little money making schemes in F NV is to advance Red Lucy's missions to the point where you can fight Deathclawsx3..then,using a sniper,when she teleports you down to the cage, open the steel door and run to the fence door,crouch and aim for the right side of the fence door on the other side of the arena.When it opens,unload on the Deathclaws before they get thru the door,quick sneak kill on 2 for sure and the other if not dead will die by your hand before he gets to you.Loot the corpses,(Eggs-400caps/Hands-75caps each)and return to Lucy for a cool 500 caps.Repeat. I can do it in less than two mins total time from talking to cap collection. However, DO NOT have any followers with you.My xp was with Boone and he kept running into the arena and shooting all over the place like a lunatic and he'd get stuck behind the fence door you come thru then phasewalk thru it somehow.Also if they are with you after shooting across the arena and killing the Deathclaws they disappear b4 you can get to the corpses and even if you get there they are probably between doors and THE DOORS SHUT AND LOCK YOU OUT and away from your loot or if in between doors they will shut and you will be stuck in there forever.And if you do get thru the metal door on the Deathclaw side, it shuts you out and you have to go up thru the manhole cover and back thru to Lucy. My friend had the same issue and he was rolling with Boone and ED-E while doing it so I experimented till i figured out the cure. Tell your minions to stay. But up top in Westside,not down in the Thorn because they (Boone 4 sure) will override your command and jump down there and go mental.And them just being in there glitches the enemies and the doors.So,if you want quick caps give it a try but do it by yourself. And if your all about the caps,don't give Lucy the Deathclaw eggs,because it will end the quest and she will take you to her room and have a little whoo-hoo session with you and after that you can't do the Thorn Arena anymore she just keeps telling you to "lay with her".

caravan is pretty fast too, i just fast travel to the convenient caravan locations, i can make about 20-30k(in about 30min-hr), then wait a day or 2 and do it again.

Arrgh,caravan.I'm not SMRT enuf to understand that game...i find it kinda complicated,and i have about a thousand cards for the game besides the starter deck you get from Ringo and I refuse to play it..the only game more complicated than caravan is Festus's game..which I could only play 3 or 4 games of before the boredom almost killed me.