Don't give up.

For consistency doing reality checks and stuff, I recommend writing RC on your wrist with a magic marker. Do a reality check every time that you see it, it should up your lucid dream count.

As for your work schedule, that seems a bit excessive. I would ask your manager to hire an assistant if you're really working that much. I can't help with your kids, but I know that there are many lucid dreamers here who have kids, they seem to work around them just fine.