Two years ago, I was making $36K a year, good bennies, all 135. Summers were busy, winter had many 3-day weekends, adding up to 800 hrs/ year. Kinda low pay, I know, but, cost of living at the homebase (small town) was pretty low. On a daily basis, I'd look for $200-$250/day, but not expect any day-guarantee. 24/7 requires a full salary as far as I'm concerned, whether you fly or watch Oprah with the pager on the coffee table....just another (worthless) opinion.
340 ops, know your fuel system; baby those engines....power reductions planned at 1"/minute, probably very conservative, but it works; don't expect great single-engine performance, especially at max weights; don't count on being able to pack much ice, they do OK in light rime, but moderate ice requires prompt "evasive action."