An easier way of paying the car off would be to contact your student loan servicer and request a forbearance. You could re route the payments towards paying off the car and come back to the Student Loans in the future. If you are both working at the moment your are phased out at around 110K on the student loan interest deduction (should be a couple of CPA’s on this board who can verify the #’s) but if you plan on cutting back hours when you have kids this would be a decent time to begin paying this back when the interest on each month payment potentially becomes deductible. Don’t know if this helps or not.