Money is pretty easy to find in RE5. However, if you need a way to obtain anymore, here's a tiny trick to help you out. You know that in some levels in the game, you'll find shiny white suitcases when you open them, you'll find a new weapon? Even if you have already beaten that level, you can re-pick those weapons AGAIN! However, this trick only works if it's not in your inventory at the time you go re-retrieve it.

Also, make sure you have a decent amount of room in YOUR INVENTORY (Sheva's doesnt matter).

The easiest way to do this trick is in Level 2-1. In the very beginning of the level there should be a suitcase with a machine gun in it. Grab it. Also, break all the crates in the room because they contain ammo and money.

Once you collected everything in that room, pause the game and click on quit. It'll ask you if you're sure you want to quit. Click yes. I can't stress this part enough; when it asks you if you want to save (or overwrite your data), CLICK ON YES!!!!!!!! I can't tell you how many times I've messed this trick up because I didn't properly save. Now, once everything saves and you're in the main menu again, click on Play Game.

Click on continue game. Now don't be surprised when it says the next chapter you're going to play is 2-1. YOU DID NOT LOSE ANY GAMEPLAY DATA! Since all your weapons and money carried over with you when you started this level, it means that you just simply brought over your equipment. ANY TIME YOU'RE DONE WITH THIS TRICK, JUST GO TO CHAPTER SELECT! The last level (or the level before) you played will STILL BE THERE!

Now, when it takes you to the item management screen, DON'T SELL THE GUNS YET! Instead, click on them and then click REMOVE. THIS WON'T DELETE THE ITEM! It will just simply keep it in the much larger inventory at the bottom of the screen. Also, remove the ammo you collected in the ammo into the bottom inventory. (If Sheva has anything you think she DOESN'T need, just move it to the bottom inventory).

Now, click on the Ready button of the item management screen and then exit out of it. When the game starts in the 2-1 area, repeat the process by recollecting the machine gun, any ammo in the crates, and the money, and then repeat the process above. Once you have a ton of machine guns and ammo's in your bottom inventory, SELL THEM ALL! This won't pay you too much, but you should get a decent amount of money. Plus, if there's any treasures you haven't sold, then SELL THEM TOO! This process will take a while but you'll gradually earn money from it.

I guess hard, repetitive work does pay off sometimes.

Once you beat the game once you will notice that you can now select infinite ammo as an option, when you start again don't be fooled it dosen't work, UNLESS you first have fully upgraded a gun and gone to the bonus features and purchased the infinite ammo for those spasific weapons.

The following extras can be unlocked once you have beaten the game once, on any difficulty setting:

The Mercanaries game mode (BSAA Chris and BSAA Sheva are the only characters that can be used when you first unlock this mode, but you can unlock others when certain requirements are met)

Safari alternative costume for Chris

Clubbin' alternative costume for Sheva

The option for Infinite Ammo

The option to play as Sheva instead of Christ in the main game

'Classic Horror' graphics filter (basically, the game in black and white)

Note - The Classic Horror graphics filter and the alternative costumes for Chris and Sheva have to be bought with bonus points.