Generally, the preference order in AYUSH courses is -> BAMS>BSMS>BHMS

Safe Score for Government Seat under MBC Category - 440-475+

But with 321 score, you may get a Private Seat. Below, I am listing some Private BAMS Colleges with low Fees ->

• Sri Sairam Siddha Medical College And Research Centre - [SSSMCRC], Tambaram
• RVS Siddha Medical College And Hospital, Kannampalayam, Coimbatore
• Ayurveda College Sulur, Coimbator
• Excel Siddha Medical College & Research Centre, Namakkal

Alternatively, to get a list of all colleges ( AYUSH ) you can get via All India Counselling with your rank and score, you can use the College Predictor Tool - NEET College Predictor 2021 - Predict Colleges based on your Rank (careers360.com)

To get complete details regarding AYUSH Courses and Admission, you may visit the link - Admission to AYUSH courses through NEET 2021 - Dates, Registration, Process (careers360.com)