Do you ever skip a night of sleep to work. Is it good or because of fatigue it is not productive and pointless??
I am particularly passionate about this topic.
Same like everyone else, we tend to just work and work non-stop and forgot to eat or even drink water or sleep.
What I can say based on my experience of doing this for 4 years PC - sleep - wake up - eat once a day - shower - PC - repeat -- will be good for the short term.
Maintaining healthy lifestyle can be pain in the ass for us, yes you and me, we picked our poison and avoid the 9-5 ones.
The first 90 days of doing this, your body and mind will get a bit numb, feeling uneasy, and just so stressed.
But as time goes by and if you keep persistent, 90 days will be enough to make it a habit and you'll be fine.
Thus your body can only take so much although you tried hard to keep awake, you'll fall asleep automatically.
Don't worry about it, as long as what you're doing makes you proud and will put food on the table for family or beloved ones, I don't see problem with it.