As ever, the ultimate supervision of any aviation activity is done in the cockpit. It doesn't matter how many rules and procedures you create, eventually you're going to have to let someone go and do the job. With only a few hundred hours flying under your belt you're going to make quite a few mistakes.....there but for the grace of God..... Unfortunately experience is expensive but if you're not prepared to pay for experience you'll have to pay the price in other ways!