Depends what they are doing too?? 12 hours of commercial, or 8 hours on domestic, do they know what they are doing and are fast ?
But i would try think of it as pay as much as you can afford, rather than as little as you can get away with, if you re gonna take on staff, theres no bigger investment in your company , so you may as well look after them , if they dont work, the business fails or stagnates at least