IMHO it all depends on how much money is involved and what you ultimately want to do. If you see the job as a stepping stone to the airlines, then given the state of the job market at the moment you might want to save your cash and hold out for another couple of months.
However, if you think you'd enjoy corporate flying for a few years and see the secondary duties on the Aztec as a positive thing then it might be worth a shot. I really like the idea of doing a mix of single and multi crew flying so if the amount involved was reasonable I'd give it a go.
Good luck, let us know how you get on,
Al