Paint = Expensive. I and a friend did the stripes on his SRT4, rally style, two strips with a pinstripe on the outsides. Took six hours to tape up the lines properly. And if you want it liquid smooth you need to re-clear the entire car.
Vinyl = Inexpensive by comparison but stickers still ain't cheap. Don't waste your time trying too do it yourself, take it to a shop. Trust me, once you put them on crookit, peal them off and try again, there goes that straight edge. The air bubbles will PISS you off too.