Hello student, National law University's are surely a government Institution but when it comes to fees it's not as low as compared to private college fees. Even if you score good rank in CLAT examination you need to pay fees in lakh to get admission in NLUs. However as they are TIER 1 law Institutes you can get education loan from bank easily. There are also various scholarship offered by the NLUs.

For fees and other information of NLUs refer to the link mentioned below - https://consortiumofnlus.ac.inConsortium of NLUs

Feel free to comment if you've any doubt

Good luck