I'm always impressed when i hear people are still working. Can you share some more details? I don't think i could work away from home and all i can do is non-physical work. I can read, think and type, talk, if it's not too much, and that's about it. If i were to work away from home, i would probably need a couch in my office or else it could not be more than one hour per day in order not to deteriorate over time.
At the moment I am able to work 30 hours each week. I work as an internet project manager, so a lot office work and not much travelling. If I had to travel a lot or do physical work, I would be useless. The brain fog was killing my work at first (not remembering words, making errors, floating), but high doses of B12 have helped tremendously. I crash a few times during the day and I just have to push myself to keep working. During the really bad days I go home earlier. I walk 30 minutes each day to the subway (when I first got my symptoms there were many times I was feeling too tired to walk about 15 minutes - that felt insane to me and I am glad I am now able to walk these distrances again). I am still able to do all house chores as well, though again I have to push myself sometimes.
Now, I think working is only possible when you have a mild case of CFS or have some control over it (and if you don't do heavy, physical work, like constructing buildings or something). I have read too many stories of people that are just too ill. On my worst days I have to rest after taking a shower, so I can relate somewhat.
There's one good side to this illness: I have hardened up a lot. My tolerance for fatigue has gone through the roof. I just keeping pushing myself... and pushing. I still have high hopes the medical community is going to find a cure or at least an effective treatment for us and that helps as well.
I remember reading about CFS/ME about a decade ago and I just couldn't understand why these people were unable to work. Now that I am ill myself I still have difficulty explaining why the fatigue is so crushing. It's just not normal fatigue, something you can try to shrug off. I remember that when I first told my boss that I was overly fatigued, he said he was tired too
The CFS fatigue does remind me of the fatigue I felt when I was plagued for a few years by a bad dust mite allergy. Because of this I still think my immune system is constantly fighting something. I beat the dust mite allergy, so that's another reason why I have hope I can get rid of this constant feeling of fatigue.