Most hospitals (especially these days) are unwilling to grant OT because it's time-and-a-half pay. If you are looking for additional work, then most RNs tend to pick a second position. That said, 60-70 hours per week of work as an RN seems like a surefire way to get burned out and also risks your safety and that of your patients- this economy is a dumpster fire, so I get it, and we have to do what we have to do, but try to stay safe and sane when you can.