She might make $2K on a good night now, but that won't last long. At some point, she'll have to have a real job to pay the bills. Turning 30, having no job and no skills is a bad place to be.
But if she is a good money manager (and most strippers probably aren't) she could work till she is 30 (or 35 if she takes care of herself) and have quite a large portfolio. Even if she only invest half of what she makes, at 2 grand a night, thats going to be a nice chunk of change.