Hi,
Though Fashion Design course packages do not come at a low cost but still I will try to list some below. As I do not know your specific location I will list the institutes located in Chennai primarily.
There are numerous institutes in South India which I am listing below that provide Fashion Design courses at low fees, you may find the details on their particular website about the particular course you want to pursue:
1. Dr. M.G.R. Educational and Research Institute, Chennai
2. SRM Ramapuram, Chennai
3. Vista Institute of Design, Chennai
4. Remo Institute of Design, Chennai
5. Tamil Nadu Open University, Chennai
6. Hindustan Institute of Technology and Science, Chennai
7. ICAT Design and Media Institute, Chennai
8. Vellore Institute of Technology, Chennai
9. DOT School of Design, Chennai
10. Madras Institute of Fashion Technology, Chennai
If you still find them costly or if possibly have to move out of your home town, you may go for online courses on Udemy, Coursera, etc, which are also available at much cheaper rates, and follow youtube channels, and groups and forums for extra knowledge addition.