[Omega]

I don't know the statistics offhand, but I know that being a network administrator, even for a moderate-sized company, can be extremely lucrative, as well as not being all that demanding.  Just pull in a network certification, from Microsoft or Cisco, or something (I'm not really sure what's considered the "preferred" certification), and find some company in need of a network or IT guru, and you're all set.  I know a fairly easy starting point for networking is getting a CCNA diploma (Cisco Certified Network Associate, i think).

Of the first two choices, I'd say you're probably more stable in a programming position, but repair or system building could be more flexable, and possibly more interesting, depending on what you're desires are.