Do you think family members are the best candidates for managing a forum? For instance, I've considered hiring my daughter as my forum admin, once she reaches her teen years. I think it will be a good experience for her and provide valuable online experience, also experience with community management and might spark her interest in being a forum owner. What are your thoughts on hiring family members?
Hiring a family member is a very good idea. This will help your family member to gather some knowledge about forums and social communities where they can get addicted to discuss whatever they like.
I never think about asking my family members to help manage a forum because no one else is interested, lol. Asking your siblings to help, for example, is quite a good idea, as long as they can maintain the same idea/purpose you want to bring your projects too. Otherwise it will bring a negative effect instead.
It's true that it becomes troublesome to 'punish' them if they make a mistake, though. That's the risk you should prepare to take if you want to bring them in.