Air Ambulance is great for time building, if you find the right company. I log about 90 hours on a slow month.
It is about what QOL you want. Want to be home more, make a little less? Go to an outfit that comes home almost every night. Want to build time, make good money, and upgrade quickly? Go to a busy operator. You may be gone 4/5 nights a week on busy months, but will get home most nights when it's slow (Summer).