If he doesn't know how to do the jobs, you are correct, he's screwed unless he hires someone who does, and the median Sr. SysAdmin in this area is paid $140K (full load) per year. The market tends to agree that an experienced SysAdmin is worth a lot.

  However, if the original poster does have someone on staff who knows how to do the tasks in question, but lacks the time, (and enjoys and is good at teaching)  then there is value to be had in Jr. SysAdmins.