HB,
Caravans are great aircraft to fly and if you are on the award wage it's almost 5000k/pa for turbine allowance. I can't think of any operators that will let you out by yourself tho without a thousand hours or so... And the single turbine time (as everyone else has said) probably wont help too much getting into the airlines.
Having said that, i fly piston twins and caravans and if it wasn't for the fact the van time is in the wrong column of the log book, i'd be flying it every day!!!
Good luck, and don't rush your career - there's lots of good times to be had.