That one, I honestly couldn't estimate. Some weeks I do no coding and just answer support emails, phone calls, and forum posts. Other weeks, I'll code seemingly nonstop over 80-90 hours/week and won't do anything else (I won't even feel like gaming during those hard core weeks, all I care about, and all I dream about is coding).
Is much time lost due to burnout? E.g. periods when you don't feel like working on code, support emails, phone calls, or forum posts -- just on leveling your character. Have you developed any techniques to deal with those periods?
Oh sure, usually after a long stint of coding (several weeks), I'll take a break from coding. But regardless of what kind of week it is, I'm answering phone calls and emails and doing general support (had to do support even on my Honeymoon with satellite internet on our cruise).
I deal with them just by knowing that they have to get done. It's hard to say. A lot of what keeps me going is pride, I guess. When I don't feel like working on the guild hosting site, I just work on random other projects to keep me going.
(I'm getting tired, so my apologies if I'm rambling nonsense)
One more: could you estimate how many total hours of work you've invested into the WoW meta-guild site?