It depends on where you are, here in California you can get a little higher base due to cost of living. Assume around 70k, 10k bonus at end of year. Promotion to rep possible after 12-18mos.
If you are seriously considering a life in trauma, be super careful about the team you decide to go with. Everything will hinge on those relationships; go for senior reps that love to teach, are emotionally intelligent, and agree that sleep is healthy. I always got my ASRs sleep if they looked wrecked, but not all seniors are that kind...weed out the "hazers". The job is hard enough without working for assholes.
Good luck.