Hello there,
Here's a list of best architecture colleges with least fees:
1. Jamia Millia Islamia University, New Delhi
Fees- Rs. 55750
2. Andhra University, Vishakhapatnam
Fees- Rs. 50000
3. Rajiv Gandhi Institute of Technology, Kottayam
Fees- Rs. 34310
4. Jadavpur University, Kolkata
Fees- Not available, but it's low.
5. Sir JJ College of Architecture, Mumbai
Fees- Rs. 99795

These are some of the best architecture colleges, with low fees. You can check other architecture colleges with low fees, and know about their admission procedure, from the link given below:
https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-india?degree=B.Arch&fee=Less%20than%20100000

Hope this answer helps you.
Good luck!!