I told a friend of mine while gaming last week not to buy weapons in the game, and what did he do? Exactly the opposite because he got impatient (forgive him, he doesn't play many RPG's). Search the lands and find the parts while looting fallen enemies, creatures or crates and barrels. Take the parts and make your weapons. Only buy parts. This will save you so much more. He made over 1000 crowns and spent it on three pieces of armor and saved it. Now he has to earn back all of that money. The Witcher is a very punishing game when it comes to earning money and even if you're doing a mission, the decisions you make can screw you out of money even if its the right decision. Its not about right or wrong, its about making as much money as possible (to upgrade your wares) and if here or there you come up with a good decision that you can afford to bypass profit then so be it.
I love my friend, but he can be impatient and foolish when playing games he doesnt master like FPS. I am passing this on to you guys now. Hopefully this info (Which should be obvious to most gamers) gets through to someone. LOL
Good luck to you all and enjoy this f'n awesome game.