I agree with a lot of the posters above, but there are some decent management outfits in existence. Try Horizon Aviation at Kemble
Making money with a small jet on an AOC is tricky. You need to fly the pants off it to make a dent in the fixed costs, but you can only do this if you have a low enough hourly rate to make it competitive, and a good charter sales team with plenty of direct customers. It's possible though. One of our Citations is doing 4 sectors / 5 hours of flying today - this summer is going to be busy