jnp
I too am in your position. I have taken a job in the offshore energy industry. The benefits are relatively high pay, 4 weeks on/ 4 weeks off, time at home to study and fly and when away, time in my cabin for undisturbed study. Best of all my wife is happy (a short 2-3 day holiday to France, Italy etc every time I come home works well).
If you are looking for a way to still pay the mortgage, consider offshore work - all disciplines are required.