Is the company DNA so focused on 60-70hrs/wk that there is no middle ground?
* Can you negotiate a raise?
You say that you're earning the least per-hour you have for 3 careers. Can you negotiate up? Sure, you hate it now, but if you were earning another 10-20k/year, would you still hate it as much?
* Can you get fired?
If you just work 40hrs/wk, will you get fired? Would you mind that?
* Can you stay on and build a network?
Can you keep drawing a paycheck, working 40-50/wk, and build a network to find another job or entrance to an art program?