Hello student. NRI quota idps also called as management quota. Seats are handled by management.

So there is no particular criteria or eligibility to get seat through NRI quota except for the fact that you need to submit certain documents

Like

Your blood relative should be resisiding in abroad, relative's residential proof, aadhar card , passport, bank statements , letter stating you are related and how etc

Certain documents from you as in aadhar, pan etc.

Coming to the fee structure it would be more than 30 lakhs through nri quota. Differs from college to college again