Let’s say for a moment that you are a vampire. As a vampire you probably have developed some expensive tastes, you need a secure place in the daytime, and you’ll want some sort of cover to allow you to meet potential victims. In short, even as a vampire you would probably need to find a job.
Obviously it has to be a night job, and paperwork might be a problem depending on whether you’ve managed to establish a false identity or not. (“Says here you were born in 1895…”)
With those considerations in mind (and any others you come up with as well), what job would you have? Or is there another way to pay your rent without working, a particularly vampiric one?