Wait, someone is hiring? In this economy, take whatever you can get. Of the companies that could conceivably be hiring, Ameriflight is the only one I can think of that's going to start you off in a multi. That said, I wouldn't be worried about advancement at this point, I'd be worried about a paycheck. You can learn a lot flying a caravan, 210, or lance. Job-wise, in single pilot 135, the only difference between a single-piston and a multi-turbine is how fast you're going when you're dozing for dollars and how much stuff there is to break.
Don't get me wrong, I like doing 250 to the marker, not worrying about how to handle a forced landing in 1/4 and 200, and (most importantly) scanning the overhead because I have an A/P, but those are luxury items. Get a job where you're treated right and they aren't going to kick you to the curb because business is off. Then hunker down and ride out the Bad Times that are just starting. Later, you can worry about fortifying your resume. Good luck.