Also factor into the expenses area unexpected medical expenses not covered by insurance (if you can get health insurance). You know as a married couple the unexpected can become the expected.
Also consider entertainment (pleasure) expenses. That is a major grievance with young couples when they are struggling financially and with school on top of it not to be able to afford to go out to eat (especially when extremely frustrated or tired) or go to a movie or whatever you are used to doing as a dating/engaged couple.
Talk it over with your parents, too.
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Draw me my Saviour, How precious Thou Art!
Success is not always measured by acceptance.
Success is also measure by completion and endurance.