Sorry I don't understand your question. Either it's super simple or I'm just misunderstanding it.
Strictly financially speaking, physicians have one of the highest paychecks and job security (minus the holly**** shinnagins and government positions and the rare CEOs stuff). Yeah you take out say 200k (I think a reasonable range if you have no significant money saved/support is between 150-250k); That's about 1 year salary for the average doctor. Yeah I know there's interest and what not - but if you live sparingly - you should be able to pay most of that off within 5 years of your 6 figure salary. Some people decide to pay it off slower (over 30 years) based on their individual needs (buy a house, started a family, new car, family to take care of, quality of life).
My annual expense right now (not including tuition): 600 rent + 300 food + 100$ free spending money (clothes, household stuff, etc) = 1k/month = 12k/year
* Don't get a car = no car maintance/insurance, free bus pass, medicaid; when you get 6 figures, say you double your expenses (got a car, etc), are you saying it's hard to pay off loans even if you doubled your expenses to 24 k? (assuming, you are single, living sparingly)
Income 200k
Taxed income = 120+k (I'm not even including tax deduction from loans);
you may need a car/insurance + living expenses = 15-20 k per year
Left over money: 100 k
= pay it off within 5 years? totally do-able. - again assuming this is no complication (family, weddings, having no life, etc).
I didn't really consider the finances too much when I applied and attend med school. The thing that made me pause to think if I want to do this was the OPPORTUNITY cost.
The years spent, the time I could've done other things (hung with friends, started a family, etc).