Hello Aspirant,

Based on previous year rank verses mark trends, your rank for 120 marks might stand between 624310 - 673394. You can use this tool to get an idea of your eligibility for mbbs admission in colleges : https://medicine.careers360.com/neet-college-predictor

I can help you out about cost management in a better way if you could specify your state or college that you are interested in. 

Hope this helps!