If it was me, I would just pay per project at a set amount.
But my last job, 3 days a week, 12 hour days (yep) came out about 400-500 a week or 10-15 a hour while I was being trained and doing extra "grunt" work for a amateur AVS.
Most people new to the business would, hell I would, love the opportunity to learn and make a little extra cash, so I think anything from 8-10 would be fair with a little extra incentive such as free training, free equipment, free hosting, etc
All of that is easily negotiable and a lot easier and cheaper to pay out then money./
Of course anyone reading this needs anyone, I'm free..
Email: lesteramod AT gmail DOT com
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