Fallout New Vegas: how to have infinite caps
No more caps problems in Fallout New Vegas
Here's what to do to have an infinite amount of caps.
Note: This trick may not work after applying the patches released for the game.
To start, go to the town of Primm. Complete the mission "My Kind Of Town" to get a sheriff for the city. After getting a sheriff, you have to wait 3 to 7 days (game time, of course ...), and the Vikki and Vance Casino will open again in Primm. Go there, and trade some caps for some casino chips. Then do the opposite, i.e. exchange the casino chips for caps. You will notice that when you swap the chips they will not be removed from the inventory, although you have obtained the caps in return. You can repeat this operation as many times as you wish. Caps at will for everyone.