How much does it cost for an Indian to join a decent US university after getting a GRE score of 315?
Apply to the universities at the earliest, and hope you get some scholarships. If you get scholarship then your whole stay at US is going to be burden free.
On the other hand, if you fail to get any scholarships. It purely depends on the universities you will apply to. If you are applying to State universities then it will not cost you an arm. The Tuition fees of such universities are usually around 12 - 15 grants (USD) per annum. & if you are applying to Private universities then the amount may turn out almost double the state universities.
Part time job will perhaps help you to sail through your living expenses.
Hope this helps.