All good advice, and the only thing I'd really add is that 72-plus hour weeks is not conducive to good mental health in the best of people. It may seem like the easy option now, or it may seem necessary to make ends meet, but that much job - even the best of them - is going to lead to burnout sooner or later. I'd suggest cutting back, starting a savings (if money is an issue), and finding something to do outside of work, bonus if it gets them meeting people, but even if it doesn't, you need to take care of your soul.