Starting salary can vary quite a bit based on type of practice (large, small, mixed, etc.), whether or not you or going into an internship/residency that first year or into private practice, if you go into the private or public sector, etc. So theoretically, you may be able to do it depending on what field you go into and the quality of life you judge as acceptable.
It has been recommended to the students at my school, by several different speakers, that unless you are a person who will be driven crazy by having debt any longer than necessary, doing the IBR program and paying off as little as possible until your debt is forgiven is actually the smartest plan financially. At least one person (a certified financial planner, specializing in vet med) recommended this even after we brought up the issue of the forgiven income being taxable the year it is forgiven.