You have to spend nearly 4 to 5 lakh for aeronautical engineering and work very hard to achieve something  this stream
Just go and check out hindusthan university which is the best aeronautical college
All the best....

Here are some of the top colleges you can check the Aeronautical Engineering colleges given below:

Manipal Institute of Technology, Manipal

PEC University of Technology, Chandigarh

Indian Institute of Space Science and Technology, Thiruvananthapuram

Madras Institute of Technology, Chennai

Sathyabama Institute of Science and Technology, Chennai

Dayananda Sagar College of Engineering, Bangalore

You can check the complete list of the colleges & fees structure to click the particular college with the given below link.

Https://engineering.careers360.com/colleges/list-of-aeronautical-engineering-colleges-in-india

Good Luck!