NIET does not offer any facility to pay the hostel fee in installments. The students can however pay some amount as booking amount. But the administration may say that they will not allow you to give semester exams and inhibit giving admit cards. So you need to pay the rest amount before the semester exam. The team may also impose a late submission fee.

I have a few friends who recently graduated from NIET. According to them, choose the hostel if you are in your first year. Otherwise, you can also live in any PG or Flat nearby as per your convenience.