If the job will increase your knowledge and skills - take it. At the ripe age of 32 I got into one of the finest art schools in the country but wasn't able to swing it financially. Instead, I left a decent job in IT to first be a producer (commission sales for a local tv show and commercials), then ran and created their websites, then edited, then filmed (Sony DSR 500 and PD150) - basically learning everything I needed to know to start my own media company - although I've yet to shoot in film which I am looking forward to.
I now freelance shoot and edit and somehow manage to pay the bills each month. This industry started on the basis of apprenticeship and in my humble opinion you learn much more by getting your hands dirty and doing things. I've been on many gigs with people fresh out of college who couldn't light, shoot or get sound to save their butts.
Keep learning and charge as much as the market will bear.