Well, if you win the maximum amount allowed before being banned, in all the casinos, you get 51500 caps, this is not counting all the extra rewards you get from each casino (which includes a Combat Armor Reinforced, worth 5500+ caps), and also not counting how you can win above the limit by (when being close to reaching it), just bet on a high reward (which can give you a lot of chips in one go and push the earnings way above the limit). This is more than enough to buy all the Implants and still having around 10k caps left. If we factor the free Sierra Madre 1000 chips every 3 days (from the complimentary vouchers), then that money becomes any amount you want. This is extremely exploitable, since with 1k SM Chips (from each voucher) allows the player to acquire 50 Weapon Repair Kits, which then can be used to buy a weapon with low condition from a vendor (or just use one the player already owns), and repair it to max and sell it for a huge profit. This is one of the oldest and well known exploit in FNV to get rich fast. It's actually a good game mechanic. The more you use something, the more damaged it gets, so it should affect it's performance. It's better than the NV one where you need to damage a weapon every 25% to suffer any consequences. Not to mention that in NV, with weapon jamming chance reduced, with the ability to repair to max condition no matter your skill, with Weapon repair Kits, Raul's companion perk and the Jury Rigging perk, there's really no point in having durability in weapons. It's obvious that Obsidian didn't like the whole "repair your weapon" thing (this can explain why they simplified the system to be less punishing for the player) and made it as redundant as possible without removing it (probably because it's in FO3, so Bethesda wanted NV to have it too or something).