I don't spend money on books. I write them myself.

The more money you spend on guns, the less money you spend on people! More weapons, less happiness; more guns, more misery!

If you don't have any good idea, you are likely to waste money if it's given to you! If you don't have an idea, you can't even know how much money you need... This is because; it's your ideas that give you the cost to pay!